GED - General Educational Development Math Test #9 1 — Questions and Answers
Question 1: Solve for x: 3x + 7 = 22
- 3
- 5 (Correct answer)
- 7
- 9
Correct answer: 5
Subtract 7 from both sides to get 3x = 15, then divide both sides by 3 to get x = 5.
Question 2: A rectangle has a length of 12 cm and a width of 7 cm. What is its area?
- 38 cm²
- 76 cm²
- 84 cm² (Correct answer)
- 96 cm²
Correct answer: 84 cm²
Area of a rectangle = length × width = 12 × 7 = 84 cm². The perimeter (38 cm × 2 sides = 76) is a common distractor but is not the area.
Question 3: A car travels 180 miles in 3 hours. What is its average speed in miles per hour?
- 45 mph
- 55 mph
- 60 mph (Correct answer)
- 65 mph
Correct answer: 60 mph
Average speed = distance ÷ time = 180 ÷ 3 = 60 mph.
Question 4: What is the slope of the line passing through the points (2, 3) and (6, 11)?
- ½
- 1
- 2 (Correct answer)
- 4
Correct answer: 2
Slope = (y₂ − y₁) / (x₂ − x₁) = (11 − 3) / (6 − 2) = 8 / 4 = 2.
Question 5: The ages of five students are 13, 14, 15, 16, and 17. What is the mean (average) age?
- 14
- 15 (Correct answer)
- 16
- 17
Correct answer: 15
Mean = sum of values ÷ number of values = (13 + 14 + 15 + 16 + 17) ÷ 5 = 75 ÷ 5 = 15.
Question 6: What is ¾ expressed as a decimal?
- 0.34
- 0.43
- 0.70
- 0.75 (Correct answer)
Correct answer: 0.75
Divide the numerator by the denominator: 3 ÷ 4 = 0.75. You can also think of it as 75 hundredths.
GED - General Educational Development Math Test #9 1
Solve for x: 3x + 7 = 22