A number decreased by 10% becomes 90. The number is: MCQ with Answer and Explanation

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A number decreased by 10% becomes 90. The number is:

A. 95

B. 105

C. 110

D. 100

Answer: Option D

Solution (By JKSSB Mock Tests)

0.9x = 90 → x = 100.

This question belongs to: Maths Percentage

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Question #1

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If the price of petrol increases by 40%, by what percent must a person reduce consumption so that expenditure increases by only 12%?

A. 20%

B. 22%

C. 18%

D. 15%

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Correct Answer: Option A

Explanation:
1.4 × x = 1.12 → x = 0.8, reduction 20%.

This question belongs to: Maths Percentage

Question #2

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To pass need 33%. Student gets 33 marks, fails by 33. Max marks:

A. 200

B. 190

C. 180

D. 210

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Correct Answer: Option A

Explanation:
Pass = 66, 33% M = 66 → M = 200.

This question belongs to: Maths Percentage

Question #3

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A person buys an article at 20% discount on the marked price and sells it at the marked price. What is his profit percent?

A. 22%

B. 25%

C. 28%

D. 20%

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Correct Answer: Option B

Explanation:
Let MP=100, CP=80, SP=100, profit% = (20/80)×100 = 25%.

This question belongs to: Maths Percentage

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