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. 110

B. 100

C. 95

D. 105

Answer: Option B

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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After spending 80% of his income, a man saves Rs. 3000. His income is:

A. 16000

B. 12000

C. 14000

D. 15000

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Correct Answer: Option D

Explanation:
Savings 20% = 3000, income = 3000/0.2 = 15000.

This question belongs to: Maths Percentage

Question #2

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Value of a scooter depreciates 10% per year. Price 40,000, after 1 year value is:

A. 35,000

B. 36,000

C. 37,000

D. 34,000

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Correct Answer: Option B

Explanation:
40,000 × 0.9 = 36,000.

This question belongs to: Maths Percentage

Question #3

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A man gave 20% to his wife, 25% of remainder to his son, 30% of remainder to his daughter, and the rest Rs. 16800 to charity. Total amount:

A. 36000

B. 35000

C. 40000

D. 37500

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Correct Answer: Option C

Explanation:
Wife 20%, left 80%. Son 20% of total (25% of 80), left 60%. Daughter 18% of total (30% of 60), left 42% = 16800 → total=40000.

This question belongs to: Maths Percentage

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