West B Test Mathematics 3 — Questions and Answers
Question 1: A store marks up a $40 item by 25%. What is the new selling price?
- $48
- $50 (Correct answer)
- $65
- $45
Correct answer: $50
25% of $40 = $10, so the selling price = $40 + $10 = $50.
Question 2: What is the least common multiple (LCM) of 4 and 6?
- 2
- 24
- 12 (Correct answer)
- 8
Correct answer: 12
Multiples of 4: 4, 8, 12… and multiples of 6: 6, 12… so LCM = 12.
Question 3: A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of randomly selecting a blue marble?
- 1/2
- 5/10 (Correct answer)
- 3/10
- 1/5
Correct answer: 5/10
5 blue out of 10 total marbles gives a probability of 5/10 = 1/2.
Question 4: Which expression represents the distributive property applied to 3(x + 4)?
- 3x + 4
- 3 + x + 4
- 3x + 12 (Correct answer)
- 7x
Correct answer: 3x + 12
Distributing 3 gives 3·x + 3·4 = 3x + 12.
Question 5: What is the area of a circle with radius 5 cm? (Use π ≈ 3.14)
- 31.4 cm²
- 15.7 cm²
- 78.5 cm² (Correct answer)
- 78.5 cm
Correct answer: 78.5 cm²
Area = πr² = 3.14 × 5² = 3.14 × 25 = 78.5 cm².
Question 6: In the proportion 3/5 = x/25, what is the value of x?
- 10
- 15 (Correct answer)
- 20
- 5
Correct answer: 15
Cross-multiplying: 3 × 25 = 5x → 75 = 5x → x = 15.
Question 7: Which set of numbers is ordered from least to greatest?
- −3, −1, 0, 2 (Correct answer)
- 2, 0, −1, −3
- 0, −1, −3, 2
- −1, −3, 0, 2
Correct answer: −3, −1, 0, 2
On a number line, −3 < −1 < 0 < 2, so −3, −1, 0, 2 is correct.
West B Test Mathematics 3
A store marks up a $40 item by 25%.
What is the new selling price?