WIAT Mathematical Problem Solving & Computation 5 — Questions and Answers
Question 1: A coat originally costs $120 and is on sale for 25% off. What is the sale price?
- $85
- $90 (Correct answer)
- $95
- $105
Correct answer: $90
25% of $120 = $30 discount, so sale price = $120 − $30 = $90.
Question 2: What is the value of the expression 2³ + 4² − √25?
- 19 (Correct answer)
- 21
- 23
- 27
Correct answer: 19
2³ = 8, 4² = 16, √25 = 5; so 8 + 16 − 5 = 19.
Question 3: A worker earns $15 per hour and works 38 hours in a week. How much does she earn that week?
- $530
- $555
- $570 (Correct answer)
- $590
Correct answer: $570
15 × 38 = $570.
Question 4: A rectangle has a length of 14 cm and a width of 5 cm. What is its perimeter?
- 19 cm
- 38 cm (Correct answer)
- 70 cm
- 48 cm
Correct answer: 38 cm
Perimeter = 2(14 + 5) = 2 × 19 = 38 cm.
Question 5: What is 3/8 expressed as a decimal?
- 0.305
- 0.375 (Correct answer)
- 0.38
- 0.425
Correct answer: 0.375
3 ÷ 8 = 0.375.
Question 6: A class of 30 students has a ratio of boys to girls of 2:3. How many girls are in the class?
- 12
- 15
- 18 (Correct answer)
- 20
Correct answer: 18
Girls make up 3/5 of the class: 3/5 × 30 = 18 girls.
Question 7: Which of the following is divisible by both 4 and 6?
- 14
- 18
- 24 (Correct answer)
- 34
Correct answer: 24
24 ÷ 4 = 6 and 24 ÷ 6 = 4, so 24 is divisible by both.
WIAT Mathematical Problem Solving & Computation 5
A coat originally costs $120 and is on sale for 25% off.
What is the sale price?