IAR Math Concepts and Reasoning 3

Question 1

A store offers a 20% discount on a $50 jacket. What is the sale price?

Accepted Answer

$40

Answer

20% of $50 is $10, so the sale price is $50 − $10 = $40.

Question 2

Which of the following is a prime number?

Accepted Answer

29

Answer

29 has no factors other than 1 and itself, making it prime.

Question 3

Solve for x: 2x − 5 = 11.

Accepted Answer

8

Answer

Add 5 to both sides to get 2x = 16, then divide by 2 to get x = 8.

Question 4

What is the mean of the data set 4, 8, 6, 10, 12?

Accepted Answer

8

Answer

The sum is 40 and there are 5 values, so 40 ÷ 5 = 8.

Question 5

A triangle has angles of 50° and 60°. What is the measure of the third angle?

Accepted Answer

70°

Answer

The angles of a triangle sum to 180°, so 180 − 50 − 60 = 70°.

IAR Practice Test