GMAS Mathematics 3

Question 1

Solve for x: 3x − 7 = 14

Accepted Answer

x = 7

Answer

Add 7 to both sides to get 3x = 21, then divide by 3 to get x = 7.

Question 2

A circle has a radius of 5 cm. What is its circumference? (Use π ≈ 3.14)

Accepted Answer

31.40 cm

Answer

Circumference = 2πr = 2 × 3.14 × 5 = 31.40 cm.

Question 3

Which number is NOT a prime number?

Accepted Answer

21

Answer

21 = 3 × 7, so it has factors other than 1 and itself, making it composite.

Question 4

What is 15% of 200?

Accepted Answer

30

Answer

15% of 200 = 0.15 × 200 = 30.

Question 5

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of randomly picking a blue marble?

Accepted Answer

1/2

Answer

There are 5 blue marbles out of 10 total, so P = 5/10 = 1/2.

(GMAS) Georgia Milestones Assessment System Practice Test