CLAST Arithmetic and Number Sense

Question 1

What is the value of 3/4 + 2/3?

Accepted Answer

17/12

Answer

Finding a common denominator of 12: 9/12 + 8/12 = 17/12.

Question 2

A student scores 18 out of 24 on a quiz. What percentage did the student earn?

Accepted Answer

75%

Answer

18 ÷ 24 = 0.75, which equals 75%.

Question 3

Which of the following is an irrational number?

Accepted Answer

√7

Answer

√7 cannot be expressed as a fraction of two integers; it is irrational because 7 is not a perfect square.

Question 4

What is the least common multiple (LCM) of 6 and 8?

Accepted Answer

24

Answer

The multiples of 6 are 6, 12, 18, 24... and of 8 are 8, 16, 24...; the smallest common multiple is 24.

Question 5

Simplify: 5² + 3 × 4 − 6 ÷ 2

Accepted Answer

34

Answer

Using order of operations: 25 + 12 − 3 = 34.

CLAST - College Level Academic Skills Test Practice Test