i-Ready Diagnostic Test Diagnostic Number and Operations 5

Question 1

A savings account earns simple interest at 4% per year. If $500 is deposited, how much interest is earned in 3 years?

Accepted Answer

$60

Answer

Simple interest = P × r × t = 500 × 0.04 × 3 = $60.

Question 2

Which of the following is an irrational number?

Accepted Answer

√50

Answer

√50 cannot be simplified to a whole number or simple fraction, making it irrational.

Question 3

What is 2.4 × 10⁻³ written in standard form?

Accepted Answer

0.0024

Answer

10⁻³ means move the decimal 3 places left: 2.4 → 0.0024.

Question 4

A pizza is cut into 8 equal slices. If 3 people each eat 2 slices, what fraction of the pizza remains?

Accepted Answer

1/4

Answer

3 × 2 = 6 slices eaten; 8 − 6 = 2 remaining; 2/8 = 1/4.

Question 5

Which property is shown by 5 × (2 + 3) = (5 × 2) + (5 × 3)?

Accepted Answer

Distributive Property

Answer

The Distributive Property states that a × (b + c) = (a × b) + (a × c).

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