GMAT Quantitative: Number Properties 2

Question 1

If n is a positive integer, which of the following must be even?

Accepted Answer

n(n+1)

Answer

n+2

Answer

2n+1

Answer

n^2

Question 2

What is the units digit of 7^23?

Accepted Answer

3

Answer

1

Answer

7

Answer

9

Question 3

How many positive divisors does 36 have?

Accepted Answer

9

Answer

6

Answer

8

Answer

12

Question 4

If x is an odd integer, which expression is always odd?

Accepted Answer

3x

Answer

x+1

Answer

2x

Answer

x^2-1

Question 5

What is the remainder when 47 is divided by 6?

Accepted Answer

5

Answer

1

Answer

3

Answer

4

Question 6

Which of the following is a prime number?

Accepted Answer

83

Answer

91

Answer

87

Answer

House 51

Question 7

If the sum of three consecutive integers is 72, what is the largest of them?

Accepted Answer

25

Answer

23

Answer

24

Answer

26