GED Mathematical Reasoning Arithmetic and Number Sense 5 — Questions and Answers
Question 1: A bag contains 5 red, 3 blue, and 2 green marbles. What fraction of the marbles are blue?
- 1/5
- 3/10 (Correct answer)
- 1/3
- 2/5
Correct answer: 3/10
There are 3 blue out of 10 total marbles, so the fraction is 3/10.
Question 2: What is 4.8 ÷ 0.06?
- 0.8
- 8
- 80 (Correct answer)
- 800
Correct answer: 80
4.8 ÷ 0.06 = 480 ÷ 6 = 80.
Question 3: A shirt costs $36 after a 25% discount. What was the original price?
- $45
- $48 (Correct answer)
- $54
- $60
Correct answer: $48
If $36 is 75% of the original price, then original = 36 ÷ 0.75 = $48.
Question 4: Which number is a perfect square?
- 50
- 72
- 81 (Correct answer)
- 90
Correct answer: 81
81 = 9², so it is a perfect square.
Question 5: What is the value of −6 + (−3) − (−9)?
- -18
- -6
- 0 (Correct answer)
- 6
Correct answer: 0
−6 + (−3) − (−9) = −6 − 3 + 9 = 0.
Question 6: A number increased by 18 equals 53. What is the number?
- 25
- 31
- 35 (Correct answer)
- 71
Correct answer: 35
53 − 18 = 35.
Question 7: What is 5/6 ÷ 2/3?
- 5/9
- 5/8
- 1¼ (Correct answer)
- 10/9
Correct answer: 1¼
5/6 ÷ 2/3 = 5/6 × 3/2 = 15/12 = 5/4 = 1¼.
GED Mathematical Reasoning Arithmetic and Number Sense 5
A bag contains 5 red, 3 blue, and 2 green marbles.
What fraction of the marbles are blue?