MASS Mathematical Usage 3 — Questions and Answers
Question 1: The ratio of boys to girls in a class is 3:5. If there are 24 students total, how many are girls?
- 9
- 12
- 15 (Correct answer)
- 18
Correct answer: 15
Total parts = 8; each part = 3 students, so girls = 5 × 3 = 15.
Question 2: What is 3/8 expressed as a decimal?
- 0.275
- 0.375 (Correct answer)
- 0.425
- 0.625
Correct answer: 0.375
3 ÷ 8 = 0.375.
Question 3: A worker earns $18 per hour and works 35 hours. What are the weekly earnings?
- $530
- $600
- $630 (Correct answer)
- $680
Correct answer: $630
18 × 35 = $630.
Question 4: What is the perimeter of a square with a side length of 9 inches?
- 18 inches
- 27 inches
- 36 inches (Correct answer)
- 81 inches
Correct answer: 36 inches
Perimeter = 4 × side = 4 × 9 = 36 inches.
Question 5: If 5 pencils cost $2.00, how much do 8 pencils cost?
- $2.80
- $3.00
- $3.20 (Correct answer)
- $4.00
Correct answer: $3.20
Each pencil costs $0.40, so 8 × $0.40 = $3.20.
Question 6: What is the average of 12, 18, 24, and 30?
- 18
- 21 (Correct answer)
- 24
- 27
Correct answer: 21
Sum = 84; 84 ÷ 4 = 21.
Question 7: Solve: 48 ÷ 6 + 2 × 3.
- 10
- 14 (Correct answer)
- 16
- 30
Correct answer: 14
48 ÷ 6 = 8 and 2 × 3 = 6, so 8 + 6 = 14.
MASS Mathematical Usage 3
The ratio of boys to girls in a class is 3:5.
If there are 24 students total, how many are girls?