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What is 3 percent of 60?
- A. 0.18
- B. 1.8
- C. 18
- D. 0.018
Correct Answer: B
Rationale: To find 3% of 60, you multiply 60 by 3% (or 0.03).
So, 60 x 0.03 = 1.8.
Therefore, the correct answer is B: 1.8.
Choice A (0.18) is incorrect as it represents 0.3% of 60. Choice C (18) is incorrect as it represents 30% of 60. Choice D (0.018) is incorrect as it represents 0.03% of 60.
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How many grams are in 2 kilograms?
- A. 20 grams
- B. 200 grams
- C. 2 grams
- D. 2,000 grams
Correct Answer: D
Rationale: Correct Answer: D (2,000 grams)
Rationale:
1. 1 kilogram = 1,000 grams.
2. To convert 2 kilograms to grams, multiply 2 by 1,000.
3. 2 x 1,000 = 2,000 grams.
Summary:
A: Incorrect; 2 kilograms is not equal to 20 grams.
B: Incorrect; 2 kilograms is not equal to 200 grams.
C: Incorrect; 2 kilograms is not equal to 2 grams.
Convert 5 3/4 to a decimal. Round to the nearest tenth.
- A. 5.75
- B. 5.7
- C. 6
- D. 5.8
Correct Answer: A
Rationale: To convert the mixed number 5 3/4 to a decimal, divide the numerator by the denominator. In this case, 3 divided by 4 equals 0.75. Therefore, 5 3/4 can be written as 5.75 in decimal form. Rounding 5.75 to the nearest tenth yields 5.8, not 5.7 or 6. Hence, the correct answer is 5.75 since it represents 5 3/4 as a decimal rounded to the nearest tenth.
A young adult is running a 24-mile course. If they run the first 6 miles in 1 hour, the second 6 miles in 1.2 hours, the third 6 miles in 1.5 hours, and the fourth 6 miles in 1.6 hours, how long will it take them to complete the run? (Round to the nearest tenth.)
- A. 5.3
- B. 5.6
- C. 5.8
- D. 6
Correct Answer: A
Rationale: To find the total time taken to complete the 24-mile run, add the times for each segment: 1 + 1.2 + 1.5 + 1.6 = 5.3 hours. Therefore, it will take them 5.3 hours to finish the 24-mile course. The correct answer is A, 5.3 hours.
What is the sum of 6, 12.55, and 5.022?
- A. 18.572
- B. 23.572
- C. 30.572
- D. 16.572
Correct Answer: B
Rationale: To find the sum of 6, 12.55, and 5.022, you add the numbers together: 6 + 12.55 + 5.022 = 23.572. The correct answer is B, 23.572, as this is the total sum of the three numbers provided. Therefore, the sum of 6, 12.55, and 5.022 is 23.572.
What is the sum of 23.5 + 7.025?
- A. 30.525
- B. 30.5
- C. 30.025
- D. 16.475
Correct Answer: A
Rationale: To find the sum of 23.5 and 7.025, align the decimal points and add the numbers as if they were whole numbers. 23.5 + 7.025 equals 30.525. Therefore, the correct answer is A, which is 30.525. When adding decimal numbers, it is essential to maintain the alignment of decimal points and add the numbers accordingly. In this case, adding 23.5 and 7.025 results in 30.525, with the decimal point staying in the same position as the numbers being added.