NBT NBT Mathematics: Number Sense and Calculations

Question 1

What is the least common multiple (LCM) of 12 and 18?

Accepted Answer

36

Answer

The LCM of 12 and 18 is 36, the smallest number divisible by both 12 and 18.

Question 2

Which of the following is an irrational number?

Accepted Answer

√7

Answer

√7 cannot be expressed as a ratio of two integers since 7 is not a perfect square, making it irrational.

Question 3

What is the value of (−3)² − (−3)?

Accepted Answer

12

Answer

(−3)² = 9, and subtracting −3 is the same as adding 3, giving 9 + 3 = 12.

Question 4

How many factors does 36 have?

Accepted Answer

9

Answer

The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36, giving a total of 9 factors.

Question 5

Which of the following values is the greatest?

Accepted Answer

−0.5

Answer

−0.5 is closest to zero among these negative numbers, making it the greatest.

(NBT) National Benchmark Test Practice Test