ERB Mathematical Reasoning

Question 1

On the ERB ISEE math section, what does 'estimation' most commonly require students to do?

Accepted Answer

Find an approximate answer close to the actual value

Answer

Estimation involves finding an approximate answer that is reasonably close to the exact value, useful when exact computation is not required.

Question 2

Which property states that a × (b + c) = a × b + a × c?

Accepted Answer

Distributive property

Answer

The distributive property states that multiplying a number by a sum equals multiplying by each addend separately and then adding the results.

Question 3

What is the value of 3³ (3 to the power of 3)?

Accepted Answer

27

Answer

3³ means 3 × 3 × 3 = 27, since the exponent indicates how many times the base is multiplied by itself.

Question 4

On the ERB math section, if a ratio of boys to girls is 3:5 and there are 24 boys, how many girls are there?

Accepted Answer

40

Answer

If 3 parts = 24 boys, then 1 part = 8, so 5 parts = 40 girls.

Question 5

Which of the following is a prime number?

Accepted Answer

17

Answer

17 is a prime number because it has no factors other than 1 and itself.

ERB - Educational Records Bureau Practice Test