CLAST Arithmetic and Number Sense 1 — Questions and Answers
Question 1: What is the value of 3/4 + 2/3?
- 5/7
- 17/12 (Correct answer)
- 5/12
- 1/2
Correct answer: 17/12
Finding a common denominator of 12: 9/12 + 8/12 = 17/12.
Question 2: A student scores 18 out of 24 on a quiz. What percentage did the student earn?
- 70%
- 72%
- 75% (Correct answer)
- 80%
Correct answer: 75%
18 ÷ 24 = 0.75, which equals 75%.
Question 3: Which of the following is an irrational number?
- √9
- √16
- √25
- √7 (Correct answer)
Correct answer: √7
√7 cannot be expressed as a fraction of two integers; it is irrational because 7 is not a perfect square.
Question 4: What is the least common multiple (LCM) of 6 and 8?
- 12
- 24 (Correct answer)
- 48
- 2
Correct answer: 24
The multiples of 6 are 6, 12, 18, 24... and of 8 are 8, 16, 24...; the smallest common multiple is 24.
Question 5: Simplify: 5² + 3 × 4 − 6 ÷ 2
- 35
- 34 (Correct answer)
- 37
- 38
Correct answer: 34
Using order of operations: 25 + 12 − 3 = 34.
Question 6: A jacket costs $80 and is on sale for 25% off. What is the sale price?
- $55
- $60 (Correct answer)
- $65
- $70
Correct answer: $60
25% of $80 is $20; subtracting from $80 gives a sale price of $60.
CLAST Arithmetic and Number Sense 1
What is the value of 3/4 + 2/3?