A number increased by 10% then decreased by 10% gives net: MCQ with Answer and Explanation

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A number increased by 10% then decreased by 10% gives net:

A. 2% decrease

B. 0%

C. 1% decrease

D. 1% increase

Answer: Option C

Solution (By JKSSB Mock Tests)

1.1 × 0.9 = 0.99, 1% decrease.

This question belongs to: Maths Percentage

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Question #1

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If the price of sugar increases by 20%, by how much percent must consumption be reduced to keep expenditure constant?

A. 15%

B. 25%

C. 20%

D. 16.67%

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Correct Answer: Option D

Explanation:
Reduction % = (20/120)×100 = 16.67%.

This question belongs to: Maths Percentage

Question #2

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Two numbers are respectively 20% and 50% more than a third number. What is the ratio of the first two numbers?

A. 4:5

B. 3:5

C. 5:6

D. 2:5

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Correct Answer: Option A

Explanation:
Let the third number be 100. First number = 120. Second number = 150. Ratio = 120:150 = 4:5.

This question belongs to: Maths Percentage

Question #3

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Number increased by 30%. By what % should new number be decreased to get original?

A. 25%

B. 27.27%

C. 20%

D. 23.08%

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Correct Answer: Option D

Explanation:
Original 100, new 130. Decrease % = (30/130)×100 ≈ 23.08%.

This question belongs to: Maths Percentage

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