Ratio of two numbers 5:7. First increased 10%, second 20%. New ratio: MCQ with Answer and Explanation

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Ratio of two numbers 5:7. First increased 10%, second 20%. New ratio:

A. 55:84

B. 11:14

C. 13:17

D. 5:7

Answer: Option A

Solution (By JKSSB Mock Tests)

First = 5.5, second = 8.4, ratio = 55:84.

This question belongs to: Maths Percentage

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Question #1

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The population of a town increases by 8% annually. If its present population is 2,33,280, what was it 2 years ago?

A. 1,90,000

B. 2,10,000

C. 2,00,000

D. 1,80,000

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Correct Answer: Option C

Explanation:
Pop 2 yrs ago = 233280 / (1.08)² = 233280 / 1.1664 = 200000.

This question belongs to: Maths Percentage

Question #2

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A population increases by 5% yearly. Its present population is 88,200. What was it 2 years ago?

A. 82000

B. 78000

C. 80000

D. 84000

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Correct Answer: Option C

Explanation:
P_past = 88200 / (1.05)^2 = 88200 / 1.1025 = 80000.

This question belongs to: Maths Percentage

Question #3

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A number increased by 25% then decreased by 20% results in net change of:

A. 5% decrease

B. 5% increase

C. 4% decrease

D. 0%

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Correct Answer: Option D

Explanation:
Net multiplier = 1.25 × 0.8 = 1.0, so 0% change.

This question belongs to: Maths Percentage

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