Use these 12 original questions to identify a concept to study next. Write down an answer and your steps before reading the explanation. This short learning set is not an official GED test or a scaled-score predictor.
Mark a question as correct only when both the answer and your reasoning work. For each miss, identify whether the problem was vocabulary, choosing a method, arithmetic, or interpreting the result. Rework the problem without the explanation, then try a different question on the same skill.
The 145 passing score on an official GED subject test is a scaled score. A percent correct on these examples cannot be converted to that scale. These examples are additional public material, separate from the book’s 1,000-question collection.
What is 3/5 + 1/10?
A. 4/15 · B. 4/10 · C. 7/10 · D. 3/50
Answer: C. Convert 3/5 to 6/10, then add 1/10. The result is 7/10. Add equal-sized pieces; do not add denominators.
A car travels 156 miles using 6 gallons. What is its average miles per gallon?
A. 24 · B. 26 · C. 30 · D. 936
Answer: B. Divide distance by fuel: 156 ÷ 6 = 26 miles per gallon. Multiplying gives the wrong units.
A $60 jacket is discounted by 25%. What is the sale price before tax?
A. $15 · B. $35 · C. $45 · D. $75
Answer: C. The discount is 0.25 × 60 = $15, so the sale price is 60 − 15 = $45. The discount amount and final price answer different questions.
Evaluate −4 + 3(6 − 2).
A. −4 · B. 8 · C. 12 · D. 20
Answer: B. Parentheses first: 6 − 2 = 4. Multiply 3 × 4 = 12, then add −4 to get 8.
Solve 5x − 8 = 27.
A. 3.8 · B. 5 · C. 7 · D. 35
Answer: C. Add 8 to both sides: 5x = 35. Divide by 5 to get x = 7. Substitution gives 35 − 8 = 27.
Solve −2x ≤ 10.
A. x ≤ −5 · B. x ≥ −5 · C. x ≤ 5 · D. x ≥ 5
Answer: B. Dividing by a negative number reverses the inequality, producing x ≥ −5. Zero is a useful check: 0 ≤ 10 is true.
Find the slope through (1, 3) and (4, 9).
A. 1/2 · B. 2 · C. 3 · D. 6
Answer: B. Rise divided by run is (9 − 3)/(4 − 1) = 6/3 = 2. The rise alone, 6, is not the slope.
If f(x) = x² − 3, what is f(−4)?
A. −19 · B. −13 · C. 5 · D. 13
Answer: D. Substitute the complete input: (−4)² − 3 = 16 − 3 = 13. Parentheses matter when a negative number is squared.
A triangle has base 10 cm and perpendicular height 7 cm. Find its area.
A. 17 cm² · B. 34 cm² · C. 35 cm² · D. 70 cm²
Answer: C. Area = 1/2 × base × height = 1/2 × 10 × 7 = 35 cm². The perpendicular height is required, not a slanted side.
A rectangular box measures 3 ft by 4 ft by 5 ft. Find its volume.
A. 12 ft³ · B. 20 ft³ · C. 47 ft³ · D. 60 ft³
Answer: D. Multiply all three dimensions: 3 × 4 × 5 = 60 cubic feet. Volume uses cubic units, unlike perimeter or surface area.
What is the mean of 6, 8, 10, and 16?
A. 9 · B. 10 · C. 12 · D. 40
Answer: B. Add to obtain 40 and divide by four observations: 40/4 = 10. The median of this set is 9, so identifying the requested statistic matters.
A spinner has 8 equally likely sectors, 3 of them green. What is the probability of not landing on green?
A. 3/8 · B. 3/5 · C. 5/8 · D. 8/5
Answer: C. Five of the eight sectors are not green, so the probability is 5/8. Equivalently, subtract P(green) from 1: 1 − 3/8 = 5/8.
GEDPilot is an independent preparation project by Matthew D Giron MBA. These original examples have not been endorsed by GED Testing Service. Independent educator or assessment validation is not claimed.
Independent preparation materials. Not affiliated with or endorsed by ACE or GED Testing Service. GED is a registered trademark owned by ACE. Practice results do not predict an official GED score, and GEDPilot does not guarantee a passing score.
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