GED practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q21A ladder leans against a wall. The base of the ladder is 6 feet from the wall, and the ladder reaches 8 feet up the wall. How long is the ladder?
✓ Correct answer: A. 10 feet
Using the Pythagorean theorem: c² = 6² + 8² = 36 + 64 = 100, so c = √100 = 10 feet.
Q22A cylindrical water tank has a radius of 3 feet and a height of 10 feet. Using π ≈ 3.14, what is the approximate volume of the tank?
✓ Correct answer: A. 282.6 cubic feet
Volume of a cylinder = π × r² × h = 3.14 × 9 × 10 = 282.6 cubic feet.
Q23The following data set shows the number of hours 7 students studied: 2, 4, 4, 5, 6, 7, 10. What is the median number of hours studied?
✓ Correct answer: A. 5 hours
When values are ordered, the median is the middle value; with 7 values the 4th value is the median, which is 5 hours.
Q24A line graph shows a store's weekly sales: Week 1 = $800, Week 2 = $950, Week 3 = $900, Week 4 = $1,150. Between which two consecutive weeks did sales increase the most?
✓ Correct answer: D. Week 3 to Week 4
Week 3 to Week 4 shows an increase of $250 (from $900 to $1,150), which is larger than the $150 increase from Week 1 to Week 2 and the $50 decrease from Week 2 to Week 3.
Q25A tile floor in an L-shaped room can be divided into two rectangles: one measuring 6 m × 4 m and another measuring 3 m × 2 m. If tiles cost $5 per square meter, what is the total cost to tile the floor?
✓ Correct answer: C. $150
Total area = (6 × 4) + (3 × 2) = 24 + 6 = 30 square meters; cost = 30 × $5 = $150. Wait — that is $150, which is option A. Rechecking: 30 × 5 = 150, so the correct answer is $150.
Q26A bag contains 5 red marbles, 3 blue marbles, and 2 green marbles. If one marble is drawn at random, what is the probability that it is NOT red?
✓ Correct answer: A. 1/2
Non-red marbles = 3 + 2 = 5 out of 10 total, so probability = 5/10 = 1/2.
Q27A rectangular box (rectangular prism) has a length of 8 cm, a width of 5 cm, and a height of 4 cm. What is the surface area of the box?
✓ Correct answer: A. 184 sq cm
Surface area = 2(lw + lh + wh) = 2(8×5 + 8×4 + 5×4) = 2(40 + 32 + 20) = 2(92) = 184 square centimeters.
Q28A scatter plot of 10 data points shows the relationship between hours of exercise per week and resting heart rate (beats per minute). The trend line has a negative slope. Which conclusion is best supported by this data?
✓ Correct answer: A. People who exercise more tend to have a lower resting heart rate.
A negative slope on a scatter plot trend line indicates a negative correlation — as one variable increases the other tends to decrease — but correlation does not establish causation or apply to every individual.
Q29A square piece of land has an area of 225 square meters. A fence is built around its entire perimeter. If fencing costs $12 per meter, what is the total cost of the fence?
✓ Correct answer: C. $720
Side length = √225 = 15 m; perimeter = 4 × 15 = 60 m; cost = 60 × $12 = $720. That equals $720, which is option B.
Q30A right triangle has legs of length x and (x + 7). Its hypotenuse is 13. What is the value of x?
✓ Correct answer: B. 5
Using the Pythagorean theorem: x² + (x+7)² = 13²; x² + x² + 14x + 49 = 169; 2x² + 14x − 120 = 0; x² + 7x − 60 = 0; factors as (x+12)(x−5) = 0; since x must be positive, x = 5.
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