NJSLA Number Sense and Operations 2

Question 1

What is 15% of 80?

Accepted Answer

12

Answer

15% of 80 = 0.15 × 80 = 12.

Question 2

A number is multiplied by -3, and the result is -18. What is the number?

Accepted Answer

6

Answer

If -3 × n = -18, then n = -18 ÷ -3 = 6.

Question 3

What is the least common multiple (LCM) of 4 and 6?

Accepted Answer

12

Answer

Multiples of 4: 4, 8, 12… and of 6: 6, 12…; the smallest shared multiple is 12.

Question 4

Which expression represents '5 less than twice a number n'?

Accepted Answer

2n - 5

Answer

'Twice a number n' is 2n, and '5 less than' means subtract 5, giving 2n - 5.

Question 5

What is the value of √144?

Accepted Answer

12

Answer

12 × 12 = 144, so √144 = 12.

NJSLA Exam Practice Test