CBEST Math 3 — Questions and Answers
Question 1: A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles. What is the probability of randomly picking a blue marble?
- 1/4
- 1/3
- 3/12 (Correct answer)
- 5/12
Correct answer: 3/12
There are 3 blue marbles out of 12 total: 3/12 = 1/4.
Question 2: Simplify: 4² + 3 × 5 − 2
- 27
- 29 (Correct answer)
- 31
- 33
Correct answer: 29
4² = 16; 3 × 5 = 15; 16 + 15 − 2 = 29.
Question 3: A triangle has a base of 10 inches and a height of 6 inches. What is its area?
- 25 in²
- 30 in² (Correct answer)
- 40 in²
- 60 in²
Correct answer: 30 in²
Area of a triangle = ½ × base × height = ½ × 10 × 6 = 30 in².
Question 4: Which fraction is largest?
- 3/5
- 5/8
- 7/12
- 2/3 (Correct answer)
Correct answer: 2/3
Converting to decimals: 2/3 ≈ 0.667, which is greater than 3/5 = 0.6, 5/8 = 0.625, and 7/12 ≈ 0.583.
Question 5: A worker earns $18 per hour and works 35 hours per week. What are the worker's weekly earnings?
- $540
- $580
- $620
- $630 (Correct answer)
Correct answer: $630
18 × 35 = $630.
Question 6: What is the value of the expression 2(x − 3) + 4 when x = 7?
- 10
- 12 (Correct answer)
- 14
- 16
Correct answer: 12
2(7 − 3) + 4 = 2(4) + 4 = 8 + 4 = 12.
Question 7: A recipe calls for 2½ cups of flour. If you want to make 3 batches, how many cups of flour do you need?
- 6 cups
- 6½ cups
- 7 cups
- 7½ cups (Correct answer)
Correct answer: 7½ cups
2½ × 3 = 7½ cups.
CBEST Math 3
A bag contains 4 red marbles, 3 blue marbles, and 5 green marbles.
What is the probability of randomly picking a blue marble?