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This section tests your ability to answer Problem Solving questions in the Quantitative part of the GMAT. You are given a problem statement and some information relating to the context in which the problem is set. You should consider the numbers used in these problems to be real numbers, unless otherwise stated. All geometrical figures, i.e. triangles, in this lab should be considered to lie in a plane. You should take no more than 2 minutes per question.

In triangle ABC, line segment AB = 18, line segment BC = 15, line segment AC = 15 where D is the midpoint between A and B and the angle ADC = 90^{0}. What is the length of line segment CD?

0

Opción múltiple

A)

4 x 3

;#

B)

+ 2

;#

C)

15

;#

D)

9

;#

E)

- 306

A

A)

This is the correct answer. Half the distance of segment AB is 9. The triangle described can be described as a 9: X : 15 right angle triangle where X is the length of segment AD. A common divisor for 9 and 15 is 3, so, this triangle is proportional to a 3:X: 5 triangle. This is the well-known 3: 4: 5 right angle triangle. The answer is 4 multiplied by the common divisor 3, which gives 12 for the length of segment AD.

An alternative way to solve this problem follows.

Given angle ADC = 90^{0}, an expression for the segment distance CD is given by the Pythagorean relation (AD)^{2}+(CD)^{2}=(AC)^{2} for right angled triangles. The measure of segment AD is 9, and segment AC is 15. Expressing these quantities in the Pythagorean relation gives 9^{2}+(CD)^{2}=15^{2}. Simplifying this equation gives (CD)^{2}= 225-81 or CD=which is equal to 12; the length we sought.

B)

For this answer, CD = + 2. The is 3. Substituting this in the expression for segment CD we get 3+2=5 or CD = 5. If this is true, and because D ADC is a right triangle, the Pythagorean relation between its sides, (AD)^{2}+(CD)^{2}=(AC)^{2}, should hold. Substituting the values we are given, and the answer for this option into this relation, we have 9^{2}+5^{2}=15^{2} or 81+25=225; this is false. This is the wrong answer.

C)

For this answer, CD = 15. If this is true, and because D ADC is a right triangle, the Pythagorean relation between its sides, (AD)^{2}+(CD)^{2}=(AC)^{2}, should hold. Substituting the values we are given, and the answer for this option into this relation, we have 9^{2}+15^{2}=15^{2} or 81+225=225; this is false. This is the wrong answer.

D)

For this answer, CD = 9. If this is true, and because D ADC is a right triangle, the Pythagorean relation between its sides, (AD)^{2}+(CD)^{2}=(AC)^{2}, should hold. Substituting the values we are given, and the answer for this option into this relation, we have 9^{2}+9^{2}=15^{2} or 81+81=225; this is false. This is the wrong answer.

E)

For this answer, CD = - 306. If this is true, and because D ADC is a right triangle, the Pythagorean relation between its sides, (AD)^{2}+(CD)^{2}=(AC)^{2}, should hold. Substituting the values we are given and the answer for this option into this relation, we have 9^{2}+(- 306)^{2}=15^{2} or 81+(3.8-306)^{2} or 81 + 91,280 = 225; this is false.

This is the wrong answer.

.

2

Question 2 of 50

The largest square that can be inscribed in a circle, measures 5 feet on one of its sides. What is the circumference of the circle?

0

Opción múltiple

A)

feet

;#

B)

feet

;#

C)

10 feet

;#

D)

feet

;#

E)

feet

E

A)

The circumference of a circle is times its diameter. The diameter of the circle is equal to the length of the hypotenuse in the equilateral right triangle whose two equal sides measure 5 feet. The relation between the sides of such a right triangle is given by 5^{2}+5^{2} = x^{2}, where x is the length of the hypotenuse. Simplifying we have, which is equivalent to which in turn is. The diameter of the circle is feet and the circumference is then feet. ( feet) is therefore the wrong answer.

B)

The circumference of a circle is times its diameter. The diameter of the circle is equal to the length of the hypotenuse in the equilateral right triangle whose two equal sides measure 5 feet. The relation between the sides of such a right triangle is given by 5^{2}+5^{2} = x^{2}, where x is the length of the hypotenuse. Simplifying we have, which is equivalent to which in turn is. The diameter of the circle is feet and the circumference is then feet. ( feet) is therefore the wrong answer.

C)

The circumference of a circle is times its diameter. The diameter of the circle is equal to the length of the hypotenuse in the equilateral right triangle whose two equal sides measure 5 feet. The relation between the sides of such a right triangle is given by 5^{2}+5^{2} = x^{2}, where x is the length of the hypotenuse. Simplifying we have, which is equivalent to which in turn is. The diameter of the circle is feet and the circumference is then feet. ( feet) is therefore the wrong answer.

D)

The circumference of a circle is times its diameter. The diameter of the circle is equal to the length of the hypotenuse in the equilateral right triangle whose two equal sides measure 5 feet. The relation between the sides of such a right triangle is given by 5^{2}+5^{2} = x^{2}, where x is the length of the hypotenuse. Simplifying we have, which is equivalent to which in turn is. The diameter of the circle is feet and the circumference is then feet. ( feet) is therefore the wrong answer.

E)

This is the correct answer. The circumference of a circle is times its diameter. The diameter of the circle is equal to the length of the hypotenuse in the equilateral right triangle whose two equal sides measure 5 feet. The relation between the sides of such a right triangle is given by 5^{2}+5^{2} = x^{2}, where x is the length of the hypotenuse. Simplifying we have, which is equivalent to which in turn is. The diameter of the circle is feet and the circumference is then feet.

.

3

Question 3 of 50

The cost of a certain X1 formula 1 driver app depends on the number of buyers ‘b’ following the formula. To have the number of the X1

formula 1 driver apps double is equivalent to multiplying the original cost C by:

0

Opción múltiple

A)

5

;#

B)

0.25

;#

C)

25

;#

D)

10

;#

E)

0.5

B

A)

If the number of buyers doubles, we can then represent the new cost by. This expression, in terms of C is or. This option states (). This is the wrong answer.

B)

This is the correct answer. If the number of buyers doubles, we can then represent the new cost by. This expression, in terms of C isor.

C)

If the number of buyers doubles, we can then represent the new cost by. This expression, in terms of C isor. This option states (). This is the wrong answer.

D)

If the number of buyers doubles, we can then represent the new cost by. This expression, in terms of C isor. This option states (). This is the wrong answer.

E)

If the number of buyers doubles, we can then represent the new cost by. This expression, in terms of C isor. This option states (). This is the wrong answer.

.

4

Question 4 of 50

You have a total of 7 dollars and 25 cents in pocket change consisting of 93 coins in nickels and dimes. How many nickels are there?

0

Opción múltiple

A)

41

;#

B)

52

;#

C)

205

;#

D)

15

;#

E)

25

A

A)

This is the correct answer. Nickels (n) are 5¢ coins, and dimes (d) are 10¢ coins. The total number of cents (725) is distributed in nickels and dimes.. There are 93 coins in total, which expressed in the same terms is. Solving for d in this second equation, we have. Substituting this expression for d into the first equation we get . Solving for n we obtain, . The number of nickels is 41.

B)

Nickels (n) are 5¢ coins, and dimes (d) are 10¢ coins. The total number of cents (725) is distributed in nickels and dimes.. There are 93 coins in total, which expressed in the same terms is. Solving for d in this second equation, we have. Substituting this expression for d into the first equation we get . Solving for n we obtain, . The number of nickels is 41. This option states 52 as the number of nickels, when the number of dimes is 52. This is the wrong answer.

C)

There are 93 coins in total; therefore, it is not possible to have 205 nickels. This is the wrong answer.

D)

Nickels (n) are 5¢ coins, and dimes (d) are 10¢ coins. The total number of cents (725) is distributed in nickels and dimes.. There are 93 coins in total, which expressed in the same terms is. Solving for d in this second equation, we have. Substituting this expression for d into the first equation we get . Solving for n we obtain, . The number of nickels is 41. This option has the number of nickels at 15. This answer is wrong.

E)

Nickels (n) are 5¢ coins, and dimes (d) are 10¢ coins. The total number of cents (725) is distributed in nickels and dimes.. There are 93 coins in total, which expressed in the same terms is. Solving for d in this second equation, we have. Substituting this expression for d into the first equation we get . Solving for n we obtain, . The number of nickels is 41. This answer choice states the number of nickels is 25. This answer is wrong.

.

5

Question 5 of 50

If x^{5} +y^{5} =737, the greatest possible value of x is between:

0

Opción múltiple

A)

0 and 2

;#

B)

1 and 3

;#

C)

3 and 4

;#

D)

4 and 5

;#

E)

11 and 13

C

A)

The greatest value of x^{5} is when y = 0. In that case and taking the greatest value of the interval 2 we have 2^{5} = 32. So, the greatest value in this option’s range is < 737. This is the wrong answer.

B)

The greatest value of x^{5} is when y = 0. In that case and taking the greatest value of the interval 2 we have 3^{5} = 243. So, the greatest value in this option’s range is < 737. This is the wrong answer.

C)

This is the correct answer. The greatest value of x^{5} is when y = 0. The lowest value 3^{5} = 243, and the highest 4^{5} = 1024. The greatest value of x could be between 3 and 4.

D)

The greatest value of x^{5} is when y = 0. The lowest value in this interval 4^{5} = 1024, which is too big to satisfy the x^{5} +y^{5} =737 equality. This is the wrong answer.

E)

The greatest value of x^{5} is when y = 0. The lowest value in this interval 11^{5} = 161,051, which is too big to satisfy the x^{5} +y^{5} =737 equality. This is the wrong answer.

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6

Question 6 of 50

For how many integers n is 5^{n} = n^{4}?

0

Opción múltiple

A)

five

;#

B)

four

;#

C)

three

;#

D)

one

;#

E)

none

E

A)

For n<0 we have 5^{n} < 1 and n^{4} >0, so there is no integer that fits the criteria. For n = 0 we have 5^{n} = 1 and n^{4} = 0, so there is no integer to fit the criteria either. For n = 1 we have 5 = 1, n = 2 we have 25 = 16, n = 3 then 125 = 81 and so on. The 5^{n} function grows much faster than n^{4} so there is no integer in which they coincide as n grows. The difference between them grows as n grows. There is no integer for which the equality holds. This answer (five) is wrong.

B)

For n<0 we have 5^{n} < 1 and n^{4} >0, so there is no integer that fits the criteria. For n = 0 we have 5^{n} = 1 and n^{4} = 0, so there is no integer to fit the criteria either. For n = 1 we have 5 = 1, n = 2 we have 25 = 16, n = 3 125 = 81 and so on. The 5^{n} function grows much faster than n^{4} so there is no integer in which they coincide as n grows. The difference between them grows as n grows. There is no integer for which the equality holds. This answer (four) is wrong.

C)

For n<0 we have 5^{n} < 1 and n^{4} >0, so there is no integer that fits the criteria. For n = 0 we have 5^{n} = 1 and n^{4} = 0, so there is no integer to fit the criteria either. For n = 1 we have 5 = 1, n = 2 we have 25 = 16, n = 3 then 125 = 81 and so on. The 5^{n} function grows much faster than n^{4} so there is no integer in which they coincide as n grows. The difference between them grows as n grows. There is no integer for which the equality holds. This answer (three) is wrong.

D)

For n<0 we have 5^{n} < 1 and n^{4} >0, so there is no integer that fits the criteria. For n = 0 we have 5^{n} = 1 and n^{4} = 0, so there is no integer to fit the criteria either. For n = 1 we have 5 = 1, n = 2 we have 25 = 16, n = 3 then 125 = 81 and so on. The 5^{n} function grows much faster than n^{4} so there is no integer in which they coincide as n grows. The difference between them grows as n grows. There is no integer for which the equality holds. This answer (one) is wrong.

E)

This is the correct answer. For n<0 we have 5^{n} < 1 and n^{4} >0, so there is no integer that fits the criteria. For n = 0 we have 5^{n} = 1 and n^{4} = 0, so there is no integer to fit the criteria either. For n = 1 we have 5 = 1, n = 2 we have 25 = 16, n = 3 then 125 = 81 and so on. The 5^{n} function grows much faster than n^{4} so there is no integer in which they coincide as n grows. The difference between them grows as n grows. There is no integer for which the equality holds.

.

7

Question 7 of 50

In a certain country there are 4 times as many people using operating system Y for their computers as those who use other operating systems. The ratio of those Y system users to the totality of users in this country is:

0

Opción múltiple

A)

One to Three

;#

B)

Five to Four

;#

C)

Four to Five

;#

D)

Four to Three

;#

E)

Three to Four

C

A)

If x is the number of people not using Y operating system, then 4x is the number of people who do use it. Also, 4x + x is the total number of users for that country. We thus have the ratio of users to the totality as: 4x / (4x + x) or 4x / 5x, which is a ratio of 4 to 5. Therefore, the answer (1:3) is wrong.

B)

If x is the number of people not using Y operating system, then 4x is the number of people who do use it. Also, 4x + x is the total number of users for that country. We thus have the ratio of users to the totality as: 4x / (4x + x) or 4x / 5x, which is a ratio of 4 to 5. Therefore, the answer (5:4) is wrong.

C)

This is the correct answer. If x is the number of people not using Y operating system, then 4x is the number of people who do use it. Also, 4x + x is the total number of users for that country. We thus have the ratio of users to the totality as: 4x / (4x + x) or 4x / 5x, which is a ratio of 4 to 5.

D)

If x is the number of people not using Y operating system, then 4x is the number of people who do use it. Also, 4x + x is the total number of users for that country. We thus have the ratio of users to the totality as: 4x / (4x + x) or 4x / 5x, which is a ratio of 4 to 5. Therefore, the answer (4:3) is wrong.

E)

If x is the number of people not using Y operating system, then 4x is the number of people who do use it. Also, 4x + x is the total number of users for that country. We thus have the ratio of users to the totality as: 4x / (4x + x) or 4x / 5x, which is a ratio of 4 to 5. Therefore, the answer (3:4) is wrong.

.

8

Question 8 of 50

A software outsourcing company pays its 200 employees $8 dollars per hour for up to 40hr. per week. If the programmer works beyond that amount of hours, the company pays 50% more per hour of extra work. What is the total amount the company needs to reserve for its payroll, if the distribution of the hours worked per employee is as follows: 15% of the programmers worked 22hours, 5% 30hours, 40% the full 40hours, and the remaining employees worked a 50hour-week.

0

Opción múltiple

A)

$8,200

;#

B)

$8,560

;#

C)

$68,480

;#

D)

$82,600

;#

E)

$86,860

C

A)

In terms of the total employee population: 200(.15)(22)+200(.05)(30)+200(.4)(40)+200(.4)(50)+200(.4)(5) is the total amount of money the company needs to set aside for its payroll. The last two terms of the addition being the total number of employees (200) times the forty percent remaining employees (.4) times the number of hours (50). The last term includes half the number of hours above 40 to take into account the 50% overpay. This equation yields 8,560 hours to be paid at $8. The resulting amount due is $68,480. This answer ($8,200) is wrong.

B)

In terms of the total employee population:

200(.15)(22)+200(.05)(30)+200(.4)(40)+200(.4)(50)+200(.4)(5) is the total amount of money the company needs to set aside for its payroll. The last two terms of the addition being the total number of employees (200) times the forty percent remaining employees (.4) times the number of hours (50). The last term includes half the number of hours above 40 to take into account the 50% overpay. This equation yields 8,560 hours to be paid at $8. The resulting amount due is $68,480. This answer ($8,560) is wrong

C)

This is the correct answer. In terms of the total employee population:

200(.15)(22)+200(.05)(30)+200(.4)(40)+200(.4)(50)+200(.4)(5) is the total amount of money the company needs to set aside for its payroll. The last two terms of the addition being the total number of employees (200) times the forty percent remaining employees (.4) times the number of hours (50). The last term includes half the number of hours above 40 to take into account the 50% overpay. This equation yields 8,560 hours to be paid at $8. The resulting amount due is $68,480.

D)

In terms of the total employee population:

200(.15)(22)+200(.05)(30)+200(.4)(40)+200(.4)(50)+200(.4)(5) is the total amount of money the company needs to set aside for its payroll. The last two terms of the addition being the total number of employees (200) times the forty percent remaining employees (.4) times the number of hours (50). The last term includes half the number of hours above 40 to take into account the 50% overpay. This equation yields 8,560 hours to be paid at $8. The resulting amount due is $68,480.This answer ($82,600) is wrong.

E)

In terms of the total employee population:

200(.15)(22)+200(.05)(30)+200(.4)(40)+200(.4)(50)+200(.4)(5) is the total amount of money the company needs to set aside for its payroll. The last two terms of the addition being the total number of employees (200) times the forty percent remaining employees (.4) times the number of hours (50). The last term includes half the number of hours above 40 to take into account the 50% overpay. This equation yields 8,560 hours to be paid at $8. The resulting amount due is $68,480. This answer ($86,860) is wrong.

.

9

Question 9 of 50

At a certain university biology class, the ratio of students who are majoring in medicine to the ones who are not doing so is 2 to 7. If three more students majoring in medicine were to join the class the ratio would now be 1 to 3. How many students are in the class?

0

Opción múltiple

A)

63

;#

B)

18

;#

C)

93

;#

D)

42

;#

E)

81

E

A)

If the ratio of medical to non-medical students is represented as m/n, we have and similarly for the second situation , which gives from the first and from the second equation. Combining these equations and solving for n we have n = 63. To get the number of medical students we use, to obtain m = 18. Therefore, the total number of students in the class is This option (63) is the wrong answer.

B)

If the ratio of medical to non-medical students is represented as m/n, we have and similarly for the second situation, which gives from the first and from the second equation. Combining these equations and solving for n we have n = 63. To get the number of medical students we use, to obtain m = 18. Therefore, the total number of students in the class is This option (18) is the wrong answer.

C)

If the ratio of medical to non-medical students is represented as m/n, we have and similarly for the second situation, which gives from the first and from the second equation. Combining these equations and solving for n we have n = 63. To get the number of medical students we use, to obtain m = 18. Therefore, the total number of students in the class is This option (93) is the wrong answer.

D)

If the ratio of medical to non-medical students is represented as m/n, we have and similarly for the second situation, which gives from the first and from the second equation. Combining these equations and solving for n we have n = 63. To get the number of medical students we use, to obtain m = 18. Therefore, the total number of students in the class is This option (42) is the wrong answer.

E)

This is the correct answer. If the ratio of medical to non-medical students is represented as m/n, we have and similarly for the second situation, which gives from the first and from the second equation. Combining these equations and solving for n we have n = 63. To get the number of medical students we use, to obtain m = 18. Therefore, the total number of students in the class is

.

10

Question 10 of 50

If ((491)^{(3/5)})^{n} = 491^{2}, what is the value of n?

0

Opción múltiple

A)

0

;#

B)

1/2

;#

C)

5/3

;#

D)

3+(1/3)

;#

E)

2+(1/2)

D

A)

Both exponents must be the same for the equality to hold. We have. This is equivalent to, or . This is equivalent to . This answer (0) is wrong.

B)

Both exponents must be the same for the equality to hold. We have. This is equivalent to, or . This is equivalent to. This answer (1/2) is wrong.

C)

Both exponents must be the same for the equality to hold. We have. This is equivalent to, or . This is equivalent to. This answer (5/3) is wrong.

D)

This is the correct answer. Both exponents must be the same for the equality to hold. We have. This is equivalent to, or . This is equivalent to.

E)

Both exponents must be the same for the equality to hold. We have. This is equivalent to, or . This is equivalent to. This answer (2+(1/2)) is wrong.

.

11

Question 11 of 50

If x is the sum of all the odd integers from 70 to 110 inclusive, and y is the number of odd integers from 70 to 110, inclusive, what is the value of x + 3y?

0

Opción múltiple

A)

1780

;#

B)

1800

;#

C)

1820

;#

D)

1860

;#

E)

1880

D

A)

Because the numbers from 70 to 110 are an ordered sequence, their sum is the average times the number of numbers to be added. This average is, and the number of odd numbers in

the interval is 20(the value of y), so the sum of all the odd integers is (90)(20) = 1800. Substituting x + 3y = 1800 + 3(20) = 1860. This option (1780) is the wrong answer.

B)

Because the numbers from 70 to 110 are an ordered sequence, their sum is the average times the number of numbers to be added. This average is, and the number of odd numbers in

the interval is 20(the value of y), so the sum of all the odd integers is (90)(20) = 1800. Substituting x + 3y = 1800 + 3(20) = 1860. This option (1800) is the wrong answer.

C)

Because the numbers from 70 to 110 are an ordered sequence, their sum is the average times the number of numbers to be added. This average is, and the number of odd numbers in

the interval is 20(the value of y), so the sum of all the odd integers is (90)(20) = 1800. Substituting x + 3y = 1800 + 3(20) = 1860. Then x + 3y = 1800 + 3(20) = 1860. This option (1820) is the wrong answer.

D)

This is the correct answer. Because the numbers from 70 to 110 are an ordered sequence, their sum is the average times the number of numbers to be added. This average is, and the

number of odd numbers in the interval is 20(the value of y), so the sum of all the odd integers is (90)(20) = 1800. Substituting x + 3y = 1800 + 3(20) = 1860.

E)

Because the numbers from 70 to 110 are an ordered sequence, their sum is the average times the number of numbers to be added. This average is, and the number of odd numbers in

the interval is 20(the value of y), so the sum of all the odd integers is (90)(20) = 1800. Substituting x + 3y = 1800 + 3(20) = 1860. This option (1880) is the wrong answer.

.

12

Question 12 of 50

If x is to be chosen at random from the prime numbers less than 20, and y is to be chosen from the set { 4, 6, 8, 32, 147 }, what is the probability that xy will be even?

0

Opción múltiple

A)

;#

B)

;#

C)

;#

D)

;#

E)

D

A)

The set of prime numbers < 20 from which x could be chosen is {2, 3, 5, 7, 11, 13, 17, 19}, and for y we have { 4, 6, 8, 32, 147 }. For the xy multiplication to be even we need either x or y to be even. We then have 5 pairs starting with the number 2 and 4 pairs where x is odd and multiplied by an even number in y. The total number of pairs resulting in even numbers is then 5+4(7) = 33. The total number of pairs is 8(5) = 40. Therefore, the probability of obtaining an even number when multiplying xy is. This answer () is wrong.

B)

The set of prime numbers < 20 from which x could be chosen is {2, 3, 5, 7, 11, 13, 17, 19}, and for y we have { 4, 6, 8, 32, 147 }. For the xy multiplication to be even we need either x or y to be even. We then have 5 pairs starting with the number 2 and 4 pairs where x is odd and multiplied by an even number in y. The total number of pairs resulting in even numbers is then 5+4(7) = 33. The total number of pairs is 8(5) = 40. Therefore, the probability of obtaining an even number when multiplying xy is. This answer () is wrong.

C)

The set of prime numbers < 20 from which x could be chosen is {2, 3, 5, 7, 11, 13, 17, 19}, and for y we have { 4, 6, 8, 32, 147 }. For the xy multiplication to be even we need either x or y to be even. We then have 5 pairs starting with the number 2 and 4 pairs where x is odd and multiplied by an even number in y. The total number of pairs resulting in even numbers is then 5+4(7) = 33. The total number of pairs is 8(5) = 40. Therefore, the probability of obtaining an even number when multiplying xy is. This answer () is wrong.

D)

The set of prime numbers < 20 from which x could be chosen is {2, 3, 5, 7, 11, 13, 17, 19}, and for y we have { 4, 6, 8, 32, 147 }. For the xy multiplication to be even we need either x or y to be even. We then have 5 pairs starting with the number 2 and 4 pairs where x is odd and multiplied by an even number in y. The total number of pairs resulting in even numbers is then 5+4(7) = 33. The total number of pairs is 8(5) = 40. Therefore, the probability of obtaining an even number when multiplying xyis.

E)

The set of prime numbers < 20 from which x could be chosen is {2, 3, 5, 7, 11, 13, 17, 19}, and for y we have { 4, 6, 8, 32, 147 }. For the xy multiplication to be even we need either x or y to be even. We then have 5 pairs starting with the number 2 and 4 pairs where x is odd and multiplied by an even number in y. The total number of pairs resulting in even numbers is then 5+4(7) = 33. The total number of pairs is 8(5) = 40. Therefore, the probability of obtaining an even number when multiplying xy is. This answer () is wrong.

.

13

Question 13 of 50

What percentage is the following fraction equivalent to? (4.0080808 / 5.0101010)

0

Opción múltiple

A)

76%

;#

B)

78%

;#

C)

80%

;#

D)

81.2%

;#

E)

83.005%

C

A)

The numerator 4.0080808 is 4(1.0020202) and the denominator is 5(1.0020202) so the simplified fraction is = 80%. This answer (76%) is the wrong answer.

B)

The numerator 4.0080808 is 4(1.0020202) and the denominator is The numerator 4.0080808 is 4(1.0020202) and the denominator is 5(1.0020202) so the simplified fraction is = 80%. This answer (78%) is the wrong answer.

C)

This is the correct answer. The numerator 4.0080808 is 4(1.0020202) and the denominator is 5(1.0020202) so the simplified fraction is = 80%.

D)

The numerator 4.0080808 is 4(1.0020202) and the denominator is 5(1.0020202) so the simplified fraction is = 80%. This answer (81.2%) is the wrong answer.

E)

The numerator 4.0080808 is 4(1.0020202) and the denominator is 5(1.0020202) so the simplified fraction is = 80%. This answer (83.005%) is the wrong answer.

.

14

Question 14 of 50

Five students working individually can solve 46 problems per hour. Assuming they work at the same rate, approximately how many problems could 13 students solve in 20 minutes?

0

Opción múltiple

A)

46

;#

B)

44

;#

C)

42

;#

D)

40

;#

E)

38

D

A)

If five students produce 46 problems per hour, 10 students solve problems in the same amount of time. One student then solves problems per hour. 13 students then solve or

alternatively problems per hour. In 20 minutes, which is equal to of an hour, 13 students solve

problems. This answer (46) is the wrong answer.

B)

If five students produce 46 problems per hour, 10 students solve problems in the same amount of time. One student then solves problems per hour. 13 students then solve or

alternatively problems per hour. In 20 minutes, which is equal to of an hour, 13 students solve

problems. This answer (44) is the wrong answer.

C)

If five students produce 46 problems per hour, 10 students solve problems in the same amount of time. One student then solves problems per hour. 13 students then solve or

alternatively problems per hour. In 20 minutes, which is equal to of an hour, 13 students solve

problems. This answer (42) is the wrong answer.

D)

This is the correct answer. If five students produce 46 problems per hour, 10 students solve problems in the same amount of time. One student then solves problems per hour. 13

students then solve or alternatively problems per hour. In 20 minutes, which is equal to of an hour, 13 students solve problems.

E)

If five students produce 46 problems per hour, 10 students solve problems in the same amount of time. One student then solves problems per hour. 13 students then solve or

alternatively problems per hour. In 20 minutes, which is equal to of an hour, 13 students solve problems. This answer (38) is the wrong answer.

.

15

Question 15 of 50

If Jennifer is taller than Sandy, Mabel taller than Wendy, Tammy taller than Sandy, and Sandy is taller than Mabel, which of the following statements about the girls’ heights must be true?

I Jennifer is taller than Tammy.

II Tammy is taller than Wendy.

III Jennifer is taller than Mabel.

0

Opción múltiple

A)

I only

;#

B)

II only

;#

C)

III only

;#

D)

I and II

;#

E)

II and III

E

A)

If we order the girls from shortest to tallest we have Wendy, Mabel, and Sandy. From the problem statement, we know that Jennifer is taller than Sandy, and that Tammy is taller than Sandy. Therefore, statement II ‘Tammy is taller than Wendy’ is necessarily true because Tammy is taller than Sandy, Sandy taller than Mabel, and Mabel taller than Wendy. Through similar reasoning, we find that statement III ‘Jennifer is taller than Mabel’ is also true. This is because Jennifer is taller than Sandy and Sandy taller than Mabel. Number I is not necessarily true. This answer is wrong.

B)

If we order the girls from shortest to tallest we have Wendy, Mabel, and Sandy. From the problem statement, we know that Jennifer is taller than Sandy, and that Tammy is taller than Sandy. Therefore, statement II ‘Tammy is taller than Wendy’ is necessarily true because Tammy is taller than Sandy, Sandy taller than Mabel, and Mabel taller than Wendy. Through similar reasoning, we find that statement III ‘Jennifer is taller than Mabel’ is also true. This is because Jennifer is taller than Sandy and Sandy taller than Mabel. This option, stating ‘only II is necessarily true’ is wrong.

C)

If we order the girls from shortest to tallest we have Wendy, Mabel, and Sandy. From the problem statement, we know that Jennifer is taller than Sandy, and that Tammy is taller than Sandy. Therefore, statement II ‘Tammy is taller than Wendy’ is necessarily true because Tammy is taller than Sandy, Sandy taller than Mabel, and Mabel taller than Wendy. Through similar reasoning, we find that statement III ‘Jennifer is taller than Mabel’ is also true. This is because Jennifer is taller than Sandy and Sandy taller than Mabel. This option stating ‘only III is necessarily true’ is wrong.

D)

If we order the girls from shortest to tallest we have Wendy, Mabel, and Sandy. From the problem statement, we know that Jennifer is taller than Sandy, and that Tammy is taller than Sandy. Therefore, statement II ‘Tammy is taller than Wendy’ is necessarily true because Tammy is taller than Sandy, Sandy taller than Mabel, and Mabel taller than Wendy. Through similar reasoning, we find that statement III ‘Jennifer is taller than Mabel’ is also true. This is because Jennifer is taller than Sandy and Sandy taller than Mabel. Number I is not necessarily true. This answer stating ‘I and II are necessarily true’ is wrong.

E)

This is the correct answer. If we order the girls from shortest to tallest we have Wendy, Mabel, and Sandy. From the problem statement, we know that Jennifer is taller than Sandy, and that Tammy is taller than Sandy. Therefore, statement II ‘Tammy is taller than Wendy’ is necessarily true because Tammy is taller than Sandy, Sandy taller than Mabel, and Mabel taller than Wendy. Through similar reasoning, we find that statement III ‘Jennifer is taller than Mabel’ is also true. This is because Jennifer is taller than Sandy and Sandy taller than Mabel.

.

16

Question 16 of 50

A student who averages 4 of his 5 grades obtains 87.25. What is the lowest grade he can get on the fifth grade to obtain at least an 89 as an average?

0

Opción múltiple

A)

89

;#

B)

90

;#

C)

93

;#

D)

96

;#

E)

99

D

A)

To obtain the average of five grades, and forcing the average to be 89 we have, where is the unknown grade. Solving

for we get or equivalently . Thus, the minimum grade the student could get for an average of 89 is 96. This answer (89) is wrong.

B)

To obtain the average of five grades, and forcing the average to be 89 we have, where is the unknown grade. Solvin

g for we get or equivalently . Thus, the minimum grade the student could get for an average of 89 is 96. This answer (90) is wrong.

C)

To obtain the average of five grades, and forcing the average to be 89 we have, where is the unknown grade. Solving

for we get or equivalently . Thus, the minimum grade the student could get for an average of 89 is 96. This answer (93) is wrong.

D)

This is the correct answer. To obtain the average of five grades, and forcing the average to be 89 we have, where

is the unknown grade. Solving for we get or equivalently . Thus, the minimum grade the student could get for an average of 89 is 96.

E)

To obtain the average of five grades, and forcing the average to be 89 we have, where is the unknown grade. Solving

for we get or equivalently . Thus, the minimum grade the student could get for an average of 89 is 96. Thus, the minimum grade the student could get for an average of 89 is 96. This answer (99) is not the correct answer.

.

17

Question 17 of 50

I paid 50 dollars for a certain book at a store that is normally priced at 96% of its Suggested Retail Price (SRP). There is a special mark down of 10% on that same book. The whole store is undergoing a 30% off sale including previous markdowns. Approximately how much money did I save compared to buying the article at its SRP?

0

Opción múltiple

A)

28 dollars

;#

B)

35 dollars

;#

C)

47 dollars

;#

D)

68 dollars

;#

E)

96 dollars

C

A)

The SRP is the original amount we need to compare to 50 dollars. If X is the SRP then X(.96) is the store price. X(.96)(.9) is the price after the 10% discount, and X(.96)(.9)(.6) is the price after all the discounts. The price paid: 50 = X(.96)(.9)(.6) which solving for X gives X = 96.45. Subtracting the price paid from the SRP we get the total savings. 96.45 – 50 = 46.45. This answer (28 dollars) is wrong.

B)

The SRP is the original amount we need to compare to 50 dollars. If X is the SRP then X(.96) is the store price. X(.96)(.9) is the price after the 10% discount, and X(.96)(.9)(.6) is the price after all the discounts. The price paid: 50 = X(.96)(.9)(.6) which solving for X gives X = 96.45. Subtracting the price paid from the SRP we get the total savings. 96.45 – 50 = 46.45. This answer (35 dollars) is wrong.

C)

This is the correct answer. The SRP is the original amount we need to compare to 50 dollars. If X is the SRP then X(.96) is the store price. X(.96)(.9) is the price after the 10% discount, and X(.96)(.9)(.6) is the price after all the discounts. The price paid: 50 = X(.96)(.9)(.6) which solving for X gives X = 96.45. Subtracting the price paid from the SRP we get the total savings. 96.45 – 50 = 46.45.

D)

The SRP is the original amount we need to compare to 50 dollars. If X is the SRP then X(.96) is the store price. X(.96)(.9) is the price after the 10% discount, and X(.96)(.9)(.6) is the price after all the discounts. The price paid: 50 = X(.96)(.9)(.6) which solving for X gives X = 96.45. Subtracting the price paid from the SRP we get the total savings. 96.45 – 50 = 46.45.This answer (68 dollars) is wrong.

E)

The SRP is the original amount we need to compare to 50 dollars. If X is the SRP then X(.96) is the store price. X(.96)(.9) is the price after the 10% discount, and X(.96)(.9)(.6) is the price after all the discounts. The price paid: 50 = X(.96)(.9)(.6) which solving for X gives X = 96.45. Subtracting the price paid from the SRP we get the total savings. 96.45 – 50 = 46.45.This answer (96 dollars) is wrong.

.

18

Question 18 of 50

You need a combination of a sequence of 4 digits in which at least one is repeated, to open a certain safe. Find the number of possible number sequences that could open the safe.

0

Opción múltiple

A)

4960

;#

B)

5040

;#

C)

10000

;#

D)

90000

;#

E)

900

A

A)

This answer is correct. The number of numbers where none of the digits repeat is , which equals 5040. This is not what we are looking for. The number of numbers to be formed by four digits is 10^{4}. Since at least one of the digits is repeated, we subtract the number of sequences in which there is no repetition. The number of sequences in which at least 1 number is repeated is:.

B)

The number of numbers where none of the digits repeat is , which equals 5040. This is not what we are looking for. The number of numbers to be formed by four digits is 10^{4}. Since at least one of the digits is repeated, we subtract the number of sequences in which there is no repetition. The number of sequences in which at least 1 number is repeated is:. This answer (5040) is wrong.

C)

The total number of sequences we can form using four digits is 10^{4}. This includes sequences, which do not repeat numbers and those that do. This answer (10000) is therefore wrong.

D)

The number of numbers where none of the digits repeat is , which equals 5040. This is not what we are looking for. The number of numbers to be formed by four digits is 10^{4}. Since at least one of the digits is repeated, we subtract the number of sequences in which there is no repetition. The number of sequences in which at least 1 number is repeated is:. This answer (90000) is wrong.

E)

The number of numbers where none of the digits repeat is , which equals 5040. This is not what we are looking for. The number of numbers to be formed by four digits is 10^{4}. Since at least one of the digits is repeated, we subtract the number of sequences in which there is no repetition. The number of sequences in which at least 1 number is repeated is: 10^{4}. This answer (900) is wrong.

.

19

Question 19 of 50

Which of these numbers is the greatest?

0

Opción múltiple

A)

;#

B)

;#

C)

;#

D)

-3

;#

E)

-356

A

A)

This is the correct answer. In negative numbers, the number closest to zero is the greatest. In the options given,or -0.0000025 is the closest to zero.

B)

In negative numbers, the number closest to zero is the greatest. In the options given, or -0.0000025 is the closest to zero. This answer is equivalent to -0.000857… and is the wrong answer.

C)

In negative numbers, the number closest to zero is the greatest. In the options given,or -0.0000025 is the closest to zero. This answer,, or -0.3, is the wrong answer.

D)

In negative numbers, the number closest to zero is the greatest. In the options given,or -0.0000025 is the closest to zero. This answer (-3) is wrong.

E)

In negative numbers, the number closest to zero is the greatest. In the options given,or -0.0000025 is the closest to zero. This

answer (-356) is wrong.

.

20

Question 20 of 50

Find the value of x and of y which are the roots of this set of equations: 3x-2y=27 and -9x+6y=-81.

0

Opción múltiple

A)

(27/3,0)

;#

B)

(-27,54)

;#

C)

(-27/3,0)

;#

D)

(27,-54)

;#

E)

It cannot be done.

E

A)

To be able to determine the roots of a set of simultaneous equations, these equations must be independent. The given equations are not independent. The second equation is the first equation times (-3). In other words, , the first term of the second equation. , the second term, and the last. These equations are therefore dependent, and it is not possible to find a singular value for and another for such that the equations hold. This answer is wrong.

B)

To be able to determine the roots of a set of simultaneous equations, these equations must be independent. The given equations are not independent. The second equation is the first equation times (-3). In other words, , the first term of the second equation. , the second term, and the last. These equations are therefore dependent, and it is not possible to find a singular value for and another for such that the equations hold. This answer is wrong.

C)

To be able to determine the roots of a set of simultaneous equations, these equations must be independent. The given equations are not independent. The second equation is the first equation times (-3). In other words, , the first term of the second equation. , the second term, and the last. These equations are therefore dependent, and it is not possible to find a singular value for and another for such that the equations hold. This answer is wrong.

D)

To be able to determine the roots of a set of simultaneous equations, these equations must be independent. The given equations are not independent. The second equation is the first equation times (-3). In other words, , the first term of the second equation. , the second term, and the last. These equations are therefore dependent, and it is not possible to find a singular value for and another for such that the equations hold. This answer is wrong.

E)

This is the correct answer. To be able to determine the roots of a set of simultaneous equations, these equations must be independent. The given equations are not independent. The second equation is the first equation times (-3). In other words, , the first term of the second equation. , the second term, and the last. These equations are therefore dependent, and it is not possible to find a singular value for and another for such that the equations hold.

.

21

Question 21 of 50

Which of these fractions is equivalent to

0

Opción múltiple

A)

;#

B)

;#

C)

;#

D)

;#

E)

C

A)

Reducing the last fraction in the denominator, we obtain . We then have . Following similar reasoning, we have . Finally the last part of the fraction gives . This answer () is the wrong answer.

B)

Reducing the last fraction in the denominator, we obtain . We then have . Following similar reasoning, we have . Finally the last part of the fraction gives . This answer () is the wrong answer.

C)

This is the correct answer. Reducing the last fraction in the denominator, we obtain . We then have . Following similar reasoning, we have . Finally the last part of the fraction gives .

D)

Reducing the last fraction in the denominator, we obtain . We then have . Following similar reasoning, we have . Finally the last part of the fraction gives . This answer () is the wrong answer.

E)

Reducing the last fraction in the denominator, we obtain . We then have . Following similar reasoning, we have . Finally the last part of the fraction gives . This answer () is the wrong answer.

.

22

Question 22 of 50

What is the result of ?

0

Opción múltiple

A)

2

;#

B)

;#

C)

;#

D)

;#

E)

8

A

A)

This is the correct answer. Simplifying the numerator, we get and.

Substituting this result into the original expression results in .

B)

Simplifying the numerator, we get and.

Substituting this result into the original expression results in . This

answer () is the wrong answer.

C)

Simplifying the numerator, we get and.

Substituting this result into the original expression results in . This answer () is the wrong answer.

D)

Simplifying the numerator, we get and.

Substituting this result into the original expression results in . This

answer () is the wrong answer.

E)

Simplifying the numerator, we get, and.

Substituting this result into the original expression, results in . This

answer (8) is the wrong answer.

.

23

Question 23 of 50

A certain biker on a new speed bike averages 20miles per hour (mph) on the Ajusco-Cuernavaca part of the circuit. The biker returns along the same route from Cuernavaca to Ajusco averaging 5 mph. Which of the following answers best approximates the average speed for the complete circuit?

0

Opción múltiple

A)

mph

;#

B)

25 mph

;#

C)

13 mph

;#

D)

mph

;#

E)

8 mph

E

A)

Speed relates to distance and time through the equation:. The time the biker took to travel the first half of the journey is . The time taken to complete the circuit is.

The expression for the average speed in the complete circuit ismph. This answer

(mph) is wrong.

B)

Speed relates to distance and time through the equation:. The time the biker took to travel the first half of the journey is. The time taken to complete the circuit is. The

expression for the average speed in the complete circuit ismph. This answer

(25mph) is wrong.

C)

Speed relates to distance and time through the equation:. The time the biker took to travel the first half of the journey is. The time taken to complete the circuit is. The

expression for the average speed in the complete circuit ismph. This answer

(13mph) is wrong.

D)

Speed relates to distance and time through the equation:. The time the biker took to travel the first half of the journey is. The time taken to complete the circuit is. The expression for the average speed in the complete circuit ismph. This answer

( mph) is wrong.

E)

This is the correct answer. Speed relates to distance and time through the equation:. The time the biker took to travel the first half of the journey is. The time taken to complete the circuit is. The expression for the average speed in the complete circuit is mph.

.

24

Question 24 of 50

The number of visitors to a very popular website doubles every 15 minutes. Starting at 20,000 visitors and assuming this rate of growth to be constant, approximately how much time will it take for the website to reach 20 billion visitors?

0

Opción múltiple

A)

2 years

;#

B)

10 years

;#

C)

years

;#

D)

years

;#

E)

years

C

A)

The expression represents the time it takes for the number of visitors to reachor 20 billion. The number expresses the initial number of visitors. The doubling of the number every 15 minutes is . Solving for we have

hours. This is94 years, or approximately years. This answer (2 years) is wrong.

B)

The expression represents the time it takes for the number of visitors to reach or 20 Billion. The number expresses the initial number of visitors. The doubling of the number every 15 minutes is. Solving for we have

hours. This is94 years, or approximately years. This answer (10 years) is wrong.

C)

This is the correct answer. The expression represents the time it takes for the number of visitors to reach or 20 Billion. The number expresses the initial number of visitors. The doubling of the number every 15 minutes is . Solving for we have

hours. This is 94 years, or approximately years.

D)

The expression represents the time it takes for the number of visitors to reach or 20 Billion. The number expresses the initial number of visitors. The doubling of the number every 15 minutes is . Solving for we have

hours. This is 94 years, or approximately years. This answer (years) is wrong.

E)

The expression represents the time it takes for the number of visitors to reach or 20 Billion. The number expresses the initial number of visitors. The doubling of the number every 15 minutes is . Solving for we have

hours. This is 94 years, or approximately years. This answer (years) is wrong.

.

25

Question 25 of 50

A student at college B takes 5 minutes to type words. Which expression represents the time that this student takes to type words?

0

Opción múltiple

A)

;#

B)

;#

C)

;#

D)

;#

E)

E

A)

If the student takes 5 minutes to type words, then the student takes minutes to type 1 word. The time it takes the student to type words is . This answer () is wrong.

B)

If the student takes 5 minutes to type words, then the student takes minutes to type 1 word. The time it takes the student to type words is . This answer () is wrong.

C)

If the student takes 5 minutes to type words, then the student takes minutes to type 1 word. The time it takes the student to type words is then . This answer () is wrong.

D)

If the student takes 5 minutes to type words, then the student takes minutes to type 1 word. The time it takes the student to type words is then . This answer () is wrong.

E)

This is the correct answer. If the student takes 5 minutes to type words, the student takes minutes to type 1 word. The time it takes the student to type words is then .

.

26

Question 26 of 50

Instructions: This section tests your ability to answer Data Sufficiency questions in the Quantitative part of the GMAT. You are given a problem statement and some information relating to the context in which the question is set. You are to select the option that best describes the sufficiency of the information provided for answering the question. It is not necessary that you know the answer to the question, what is necessary is that you know whether the information provided by either the problem statement, or the two additional statements is sufficient to answer the question. You should consider the numbers used in these problems to be real numbers, unless otherwise stated. All geometrical figures, i.e. triangles, in this lab should be considered to lie in a plane. You should take no more than 2 minutes per question.

If is a positive integer, is odd?

(1)y is odd

(2)x+2 is even

0

Opción múltiple

A)

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

;#

B)

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

;#

C)

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

;#

D)

EACH statement ALONE is sufficient.

;#

E)

Statements (1) and (2) TOGETHER are NOT sufficient.

E

A)

If is odd,could be odd or even depending on whether is odd or even. We do not know whether is odd or even. Statement (1) alone is not sufficient. Option A) is incorrect.

B)

If is even, then is even. The product could be even or odd depending on whether is even or odd. Statement (2) alone is not sufficient to answer the question. Option B) is incorrect.

C)

This is the correct option. If is odd,could be odd or even depending on whether is odd or even. If is even, then is even. There is enough information to answer the question.

D)

Ifis odd,could be odd or even depending on whether is odd or even. We do not know whether is odd or even. Statement (1) alone is not sufficient. Option D) is incorrect.

E)

If is odd,could be odd or even depending on whether is odd or even. If is even, then is even. There is enough information to answer the question. Option E) is incorrect.

27

Question 27 of 50

Does?

(1)

(2)

0

Opción múltiple

A)

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

;#

B)

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

;#

C)

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

;#

D)

EACH statement ALONE is sufficient.

;#

E)

Statements (1) and (2) TOGETHER are NOT sufficient.

C

A)

If, then the equation would read or . We do not know the value of, so we do not know if the equality holds. Option A) is incorrect.

B)

If the original equation reads or . We do not know the value of, so we cannot know whether the equality holds or not. Option B) is incorrect.

C)

This is the correct option. If , then the equation would read or . If , then ,or . We can answer the question using both statements (1) and (2).

D)

If , then the equation would read or . We do not know the value of , so we do not know if the equality holds. Option D) is incorrect.

E)

If , then the equation would read or . If , then or . We can answer the question using both statements (1) and (2). Option E) is incorrect.

28

Question 28 of 50

How much did a student pay for a philosophy book at a university bookstore?

(1) The book’s suggested retail value (SRP) is $90, and there is a student discount of 15% applicable on purchases of over $100.

(2) The student bought 2 other books at that same time. The cost of the cheapest book was $4.

0

Opción múltiple

A)

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

;#

B)

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

;#

C)

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

;#

D)

EACH statement ALONE is sufficient.

;#

E)

Statements (1) and (2) TOGETHER are NOT sufficient.

E

A)

Only having the SRP and the possible discount is not enough to determine the final price paid for the philosophy book. We do not know how much the student paid for the philosophy book using statement (1) alone. Option A) is incorrect.

B)

Statement (2) alone is not sufficient to determine the final price paid for the philosophy book. Option B) is incorrect.

C)

Taking both statements (1) and (2) together we know: the book’s SRP, the possible discount, and that the price of the cheaper of the other two books bought was $4. The total purchase price is >$98. We cannot determine if the total purchase went above $100 without knowing the price of the third book. Option C) is incorrect.

D)

Only having the SRP and the possible discount is not enough to determine the final price paid for the philosophy book. We do not know how much the student paid for the philosophy book using statement (1) alone. Option D) is incorrect.

E)

This is the correct option. Taking both statements (1) and (2) together we know the book’s SRP, the possible discount, and that the price of the cheaper of the other two books bought was $4. The total purchase price is >$98. We cannot determine whether the total purchase price went above $100 without knowing the price of the third book.

29

Question 29 of 50

In triangle ABC, if is the length of segment AB, the length of segment AC, and the length of segment BC, does ?

(1)

(2)

0

Opción múltiple

A)

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

;#

B)

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

;#

C)

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

;#

D)

EACH statement ALONE is sufficient.

;#

E)

Statements (1) and (2) TOGETHER are NOT sufficient.

B

A)

Statement (1),, does not provide sufficient information on whether is a right triangle. The equation only holds for right angle triangles. Option A) is incorrect.

B)

This is the correct option. Statement (2),, provides sufficient information. If statement (2) is true, is a right triangle. The information provided by statement (2) also states that is the hypotenuse of the triangle, so the equation holds.

C)

Statement (2),, provides sufficient information. If statement (2) is true, is a right triangle. The information provided by statement (2) also states that is the hypotenuse of the triangle, so the equation holds. Option C) is incorrect.

D)

Statement (1),, does not provide sufficient information on whether is a right angle triangle. The equation only holds for right triangles. Because statement (1) is not sufficient, the statement that either statement alone is sufficient is wrong. Option D) is incorrect.

E)

Statement (2),, provides sufficient information. If statement (2) is true, is a right triangle. The information provided by statement (2) also states that is the hypotenuse of the triangle, so the equation holds. The statement that neither statement can answer the question is incorrect because, statement 2 alone could answer the question. Option E) is incorrect.

30

Question 30 of 50

A four digit number can be represented as , where each letter stands for a digit. Is number divisible by three?

(1)

(2) is divisible by 3

0

Opción múltiple

A)

Statement (1) alone is sufficient, but statement (2) alone is not sufficient.

;#

B)

Statement (2) alone is sufficient, but statement (1) alone is not sufficient.

;#

C)

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

;#

D)

EACH statement ALONE is sufficient.

;#

E)

Statements (1) and (2) TOGETHER are NOT sufficient.

A

A)

This is the correct option. For a number to be divisible by 3 the sum of its digits must be divisible by three. Statement (1) provides information about the sum of the digits in. This is sufficient information to answer the question.

B)

Statement (2) provides information about and, but there is no information about or . Therefore, only using statement (2) we cannot answer the question. Option B) is incorrect.

C)

For a number to be divisible by 3 the sum of its digits must be divisible by three. Statement 1 provides information about the sum of the digits in. This is sufficient information to answer the question. It is not necessary to consider both statements together. Option C) is incorrect.

D)

Statement (2) provides information about and, but there is no information about or. Therefore, using statement (2) alone there is insufficient information to answer the question. Stating that either statement alone is sufficient is wrong because of this. Option D) is incorrect.

E)

For a number to be divisible by 3 the sum of its digits must be divisible by three. Statement (1) provides information about the sum of the digits in. This is sufficient information to answer the question. Therefore, stating that it is not possible to answer the question with the given statements is wrong. Option E) is incorrect.