CLAST Arithmetic and Number Sense 2 — Questions and Answers
Question 1: Which of the following correctly orders these numbers from least to greatest: 0.5, 3/8, 0.4, 2/5?
- 0.4, 2/5, 3/8, 0.5
- 3/8, 0.4, 2/5, 0.5 (Correct answer)
- 0.4, 3/8, 2/5, 0.5
- 2/5, 0.4, 3/8, 0.5
Correct answer: 3/8, 0.4, 2/5, 0.5
Converting to decimals: 3/8=0.375, 2/5=0.40; order is 0.375, 0.40, 0.40, 0.50 — so 3/8, 0.4, 2/5, 0.5.
Question 2: What is 15% of 240?
- 30
- 32
- 36 (Correct answer)
- 40
Correct answer: 36
15% of 240 = 0.15 × 240 = 36.
Question 3: If a number is divisible by both 3 and 4, it must also be divisible by:
- 5
- 7
- 12 (Correct answer)
- 9
Correct answer: 12
Since 3 and 4 share no common factors, a number divisible by both must be divisible by their product, 12.
Question 4: What is the absolute value of −15 + 6?
- 9 (Correct answer)
- −9
- 21
- −21
Correct answer: 9
−15 + 6 = −9, and the absolute value of −9 is 9.
Question 5: A recipe requires 2½ cups of flour. If you triple the recipe, how many cups do you need?
- 6
- 6½
- 7
- 7½ (Correct answer)
Correct answer: 7½
2½ × 3 = 5/2 × 3 = 15/2 = 7½ cups.
Question 6: Which expression represents 'five less than three times a number n'?
- 5 − 3n
- 3n − 5 (Correct answer)
- 3(n − 5)
- 5 − n × 3
Correct answer: 3n − 5
'Three times a number' is 3n, and 'five less than' means subtract 5, giving 3n − 5.
CLAST Arithmetic and Number Sense 2
Which of the following correctly orders these numbers from least to greatest: 0.5, 3/8, 0.4, 2/5?