TheoryGED Study Guide
Study for the GED with exam topics, practice questions, a free PDF, video walkthrough and timed mock exam links.
How to study for GED
- Read the topic list so you know what the exam is likely to cover.
- Answer the free practice questions and read every explanation.
- Download the PDF for offline review.
- Use timed mock exams when your untimed practice feels comfortable.
Topics to review
- The core topics and terminology you'll be tested on
- Rules, standards and best-practice procedures
- Real-world scenarios and how to respond
- Common mistakes and how to avoid them
Try GED questions now
Q1Solve the given equation for x. −5x + 17 = 112
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✓ Correct answer: X = −19
On the left, an order of operations demands that we first multiply x by −5, then add 17. To solve this equation for x, we must “undo” each of these operations in an inverse order. Thus, we will first subtract 17 from both sides of the equation, then divide both sides of the resulting equation by −5. <br/><br/>Original equation. <br/><br/>−5x + 17 = 112<br/><br/>To “undo” adding 17, subtract 17 from both sides of the equation. <br/><br/>−5x+ 17 − 17 = 112 − 17<br/><br/>Simplify both sides. <br/><br/>−5x = 95<br/><br/>To “undo” multiplying by −5, divide both sides of the equation by −5. <br/><br/><img src="asset:assets/questions/21fbf59b80efca5e.png"/><br/><br/>Simplify both sides. <br/><br/>x = −19.
Q2Which is NOT an example of an independent event?
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✓ Correct answer: Drawing 3 cards from a deck without replacing the cards
Not replacing the card makes the next draw dependent on the previous draw because there is always 1 less card in the deck.
Q3A paper bag contains 3 blue marbles, 2 red marbles, 4 green marbles and 1 white marble. Without replacement what is the probability of drawing a red marble on first attempt and green marble on the second attempt?
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✓ Correct answer: 4/45
On the first draw there are 10 marbles therefore the probability is getting a red is 2/10 or 1/5. On the second draw there are 9 marbles the probability of getting a green is 4/9. The events are independent thus multiply the two probabilities to determine first ball is red and second is green. 1/5 * 4/9 = 4/45.
Q4Determine k so that the point (−1, k) is a solution of y = −5x+ 3.
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✓ Correct answer: K = 8
Substitute (x, y) = (−1, k) into the equation y = −5x+ 3. <br/><br/>Original equation. <br/><br/>y = −5x+ 3<br/><br/>Substitute: −1 for x, k for y. <br/><br/>k = −5(−1) + 3<br/><br/>Multiply: −5(−1) = 5. <br/><br/>k = 5 + 3<br/><br/>Add: 5 + 3 = 8. <br/><br/>k = 8<br/><br/>Thus, k = 8.
Q5Jackson leased a new car for 3 years. He agreed to pay $1,900 down and a $269 payment each month. He also agreed to pay $0.125 per mile he drove over 30,000 miles. During the 3-year lease period, Jackson drove the car 32,458 miles. Excluding taxes, what was the cost of leasing this car for 3 years?
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✓ Correct answer: $11,891.25
Add the three costs: down payment ($1,900), total monthly payments and mileage over 30,000 (<img src="asset:assets/questions/a62cfae3ba16c4fa.png"/>) to get $11,891.25.
Q6When the sum of 1.8912 and 3.1846 is rounded to the nearest hundredth, the result is:
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✓ Correct answer: 5.08
First, add the two values together without rounding.<br/><br/>1.8912 + 3.1846 = 5.0758<br/><br/>Next, round to the nearest hundredth, which is two decimal places. Since the 5 digit in the thousandths place indicates that you need to round up, the correct answer is 5.08.
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