5% of a number is 10. What is 20% of the same number? MCQ with Answer and Explanation

5% of a number is 10. What is 20% of the same number?

A. 30

B. 60

C. 40

D. 50

Answer: Option C

Number = 10/0.05 = 200. 20% of 200 = 40.

This question belongs to: Maths Percentage

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Question #1 Report Error

Car value depreciates 20% first year, 15% second. Bought for 4,00,000, value after 2 years:

A. 2,80,000

B. 2,72,000

C. 2,88,000

D. 2,56,000

Correct Answer: Option B

Explanation:
4,00,000×0.8×0.85 = 2,72,000.

This question belongs to: Maths Percentage

Question #2 Report Error

Number of boys 20% more than girls, total 88. Number of boys:

A. 40

B. 52

C. 44

D. 48

Correct Answer: Option D

Explanation:
Girls = x, boys = 1.2x, total 2.2x=88 → x=40, boys=48.

This question belongs to: Maths Percentage

Question #3 Report Error

If the price of rice decreases by 20%, by what percentage can consumption be increased without changing expenditure?

A. 25%

B. 20%

C. 33.33%

D. 30%

Correct Answer: Option A

Explanation:
Required increase = (R / (100 - R)) * 100. (20 / 80) * 100 = 25%.

This question belongs to: Maths Percentage