A number decreased by 20% becomes 64. The number is: MCQ with Answer and Explanation

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A number decreased by 20% becomes 64. The number is:

A. 84

B. 80

C. 76

D. 72

Answer: Option B

Solution (By JKSSB Mock Tests)

0.8x = 64 → x = 80.

This question belongs to: Maths Percentage

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Question #1

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The price of an article is reduced by 20% and then increased by 30%. Find the net change in the price.

A. 4% increase

B. No change

C. 4% decrease

D. 10% increase

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Correct Answer: Option A

Explanation:
0.8 × 1.3 = 1.04, 4% increase.

This question belongs to: Maths Percentage

Question #2

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65% of a number is 21 less than 80%. Number is:

A. 130

B. 120

C. 140

D. 150

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Correct Answer: Option C

Explanation:
0.8x - 0.65x = 21 → 0.15x = 21 → x = 140.

This question belongs to: Maths Percentage

Question #3

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Value of a scooter depreciates 8% per year. Price 50,000, after 1 year value is:

A. 47,000

B. 48,000

C. 46,000

D. 45,000

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Correct Answer: Option C

Explanation:
Value = 50,000 × 0.92 = 46,000.

This question belongs to: Maths Percentage

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