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

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

A. 60

B. 40

C. 30

D. 50

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

Ratio 2:5, second part expressed as percentage of total is:

A. 60%

B. 71.43%

C. 70%

D. 65.5%

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Correct Answer: Option B

Explanation:
Second part = 5/(2+5) × 100 ≈ 71.43%.

This question belongs to: Maths Percentage

Question #2

A shopkeeper sells an article at 20% profit. Had he bought it at 10% less and sold it for Rs. 30 more, he would have gained 40%. Find the cost price.

A. Rs. 400

B. Rs. 450

C. Rs. 500

D. Rs. 550

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Correct Answer: Option C

Explanation:
CP=x, SP=1.2x. New CP=0.9x, new SP=1.2x+30 = 1.4×0.9x = 1.26x → 0.06x=30 → x=500.

This question belongs to: Maths Percentage

Question #3

What is 45% of 200 minus 20% of 150?

A. 60

B. 50

C. 55

D. 65

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Correct Answer: Option A

Explanation:
90 - 30 = 60.

This question belongs to: Maths Percentage

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