CHSPE Mathematics - Number Sense 1 — Questions and Answers
Question 1: What is 15% of 240?
- 24
- 36 (Correct answer)
- 48
- 30
Correct answer: 36
15% of 240 = 0.15 × 240 = 36.
Question 2: Which of the following is an irrational number?
- 0.75
- √9
- √2 (Correct answer)
- 1/3
Correct answer: √2
√2 cannot be expressed as a fraction and its decimal never repeats or terminates, making it irrational.
Question 3: A store discounts a $80 jacket by 25%. What is the sale price?
- $55
- $60 (Correct answer)
- $65
- $20
Correct answer: $60
25% of $80 = $20 discount; $80 − $20 = $60.
Question 4: What is the least common multiple (LCM) of 4 and 6?
- 24
- 12 (Correct answer)
- 8
- 2
Correct answer: 12
The smallest number divisible by both 4 and 6 is 12.
Question 5: Order these from least to greatest: 0.6, 3/5, 58%, 0.605
- 58%, 3/5, 0.6, 0.605 (Correct answer)
- 3/5, 0.6, 58%, 0.605
- 58%, 0.6, 3/5, 0.605
- 0.6, 3/5, 58%, 0.605
Correct answer: 58%, 3/5, 0.6, 0.605
Converting all to decimals: 58%=0.58, 3/5=0.60, 0.6=0.60, 0.605; order is 0.58 < 0.60 = 0.60 < 0.605.
Question 6: Which expression equals −3²?
- 9
- −9 (Correct answer)
- 6
- −6
Correct answer: −9
−3² means −(3²) = −9 because the exponent applies only to 3, not the negative sign.
CHSPE Mathematics - Number Sense 1
What is 15% of 240?