GMAT - Graduate Management Admission Quantitative: Number Properties Questions and Answers

Question 1

If n is a positive integer such that n^2 has exactly 3 positive factors, which of the following must be true?

Accepted Answer

n is a prime number.

Answer

n is an odd number.

Answer

n is a perfect square.

Answer

n is an even number.

Question 2

When a positive integer x is divided by 8, the remainder is 5. What is the remainder when (2x + 3) is divided by 8?

Accepted Answer

5

Answer

1

Answer

3

Answer

7

Question 3

If x is an odd integer and y is an even integer, which of the following expressions must be an even integer?

Accepted Answer

2x - y

Answer

x + y

Answer

xy + x

Answer

x - y + 1

Question 4

What is the units digit of 3^55?

Accepted Answer

7

Answer

1

Answer

9

Answer

3

Question 5

The product of three consecutive positive integers is 336. What is the sum of the three integers?

Accepted Answer

21

Answer

18

Answer

24

Answer

27

Question 6

If k is a prime number greater than 2, which of the following must be an even integer?

Accepted Answer

k^2 + 1

Answer

k - 2

Answer

3k

Answer

k + 2