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Round to the nearest whole number: What is 18% of 600?
- A. 108
- B. 76
- C. 254
- D. 176
Correct Answer: A
Rationale: To find 18% of 600, you multiply 600 by 0.18, which equals 108. Since we need to round to the nearest whole number, 108 is the correct answer. When rounding, if the decimal portion is 0.5 or greater, you round up; in this case, since 0.18 is less than 0.5, the answer remains 108, the nearest whole number to the calculated value.
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What is the sum of 6 + 12.55 + 5.022?
- A. 18.55
- B. 23.572
- C. 30.572
- D. 16.575
Correct Answer: B
Rationale: To find the sum of 6, 12.55, and 5.022, add them together. 6 + 12.55 equals 18.55. Adding 5.022 to 18.55 gives a total of 23.572. Therefore, the correct answer is 23.572. The sum of these numbers is calculated by adding the individual values together while maintaining the decimal points in their respective places to get the correct total. It's essential to be precise with decimal numbers to ensure the accuracy of the final sum.
In Mr. Garcia's class, two-thirds of the students are boys. If there are 27 students in the class, how many of them are girls?
- A. 1
- B. 9
- C. 12
- D. 20
Correct Answer: B
Rationale: If two-thirds of the students are boys, then one-third must be girls. To find the number of girls, we calculate one-third of the total number of students. Since the total number of students is 27, one-third of 27 is 9. Therefore, there are 9 girls in Mr. Garcia's class.
What is the result of adding 4.934, 7.1, and 9.08 together?
- A. 21.114
- B. 21.042
- C. 20.214
- D. 59.13
Correct Answer: A
Rationale: To find the sum of 4.934, 7.1, and 9.08, you simply add them together: 4.934 + 7.1 + 9.08 = 21.114. Therefore, the correct answer is A, which equals 21.114. It is important to pay attention to the precision of the numbers while performing arithmetic operations to ensure an accurate result.
Ratio and Proportion: 4:10 :: 5:X
- A. X = 10.5
- B. X = 20
- C. X = 12.5
- D. X = 25
Correct Answer: C
Rationale: To solve for X in the given ratio and proportion, set up the proportion: (4/10) = (5/X). Cross-multiply to get 4X = 50, leading to X = 12.5. So, the correct answer is X = 12.5, making choice C the correct option.
Identify the number that represents the largest amount.
- A. 95%
- B. 1.25%
- C. 16.25%
- D. 73.90%
Correct Answer: A
Rationale: Correct Answer: A
Rationale:
To identify the largest amount, we look for the highest percentage value. 95% is the highest among the given choices.
Summary:
- Choice B (1.25%) is the smallest percentage.
- Choice C (16.25%) is higher than choice B but not the largest.
- Choice D (73.90%) is lower than choice A, making it incorrect.
In conclusion, 95% (Choice A) represents the largest amount among the options provided.