i-Ready Diagnostic Test Diagnostic Number and Operations 3

Question 1

What is 15% of 200?

Accepted Answer

30

Answer

15% of 200 = 0.15 × 200 = 30.

Question 2

If a bag contains 3 red, 5 blue, and 2 green marbles, what fraction of the marbles are blue?

Accepted Answer

1/2

Answer

5 blue out of 10 total = 5/10 = 1/2.

Question 3

Which expression represents 'the product of 8 and a number n, decreased by 3'?

Accepted Answer

8n − 3

Answer

Product of 8 and n is 8n; decreased by 3 gives 8n − 3.

Question 4

A number is divisible by both 3 and 4. Which of these could be that number?

Accepted Answer

24

Answer

24 ÷ 3 = 8 and 24 ÷ 4 = 6, so 24 is divisible by both.

Question 5

What is −8 + 5?

Accepted Answer

−3

Answer

Starting at −8 and moving 5 in the positive direction gives −3.

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