Math Number Sense and Operations 4

Question 1

Which of the following is an irrational number?

Accepted Answer

√2

Answer

√2 cannot be expressed as a fraction of two integers, making it irrational.

Question 2

What is the least common multiple (LCM) of 8 and 12?

Accepted Answer

24

Answer

The LCM of 8 and 12 is 24, the smallest number divisible by both.

Question 3

A store sells juice in 3/4-liter bottles. How many bottles are needed to fill a 6-liter container?

Accepted Answer

8

Answer

6 ÷ 3/4 = 6 × 4/3 = 8 bottles.

Question 4

What is the value of 2^5 × 2^3?

Accepted Answer

2^8

Answer

When multiplying powers with the same base, add the exponents: 2^(5+3) = 2^8.

Question 5

Which number is a perfect square?

Accepted Answer

81

Answer

81 = 9², so it is a perfect square; the others have no integer square roots.

Math Practice Test