The population of a town is 20,000. It increases by 5% annually. What will be the population after 2 years? MCQ with Answer and Explanation

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The population of a town is 20,000. It increases by 5% annually. What will be the population after 2 years?

A. 22050

B. 21000

C. 22000

D. 22100

Answer: Option A

Solution (By JKSSB Mock Tests)

Population = 20000 * (1.05)^2 = 20000 * 1.1025 = 22050.

This question belongs to: Maths Percentage

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Question #1

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Price of a commodity falls by 15%. To keep expenditure constant, consumption must increase by:

A. 18%

B. 20%

C. 17.64%

D. 15%

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Correct Answer: Option C

Explanation:
New price 0.85, consumption multiplier needed = 1/0.85 ≈ 1.17647, increase 17.64%.

This question belongs to: Maths Percentage

Question #2

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

A. 120

B. 140

C. 150

D. 130

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Correct Answer: Option B

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

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Question #3

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90 L mixture, 15% water. Water added to make 40%:

A. 36 L

B. 33.75 L

C. 37.5 L

D. 40 L

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Correct Answer: Option C

Explanation:
Water=13.5 L, milk=76.5 L. For milk 60%, total = 76.5/0.6 = 127.5 L, add 37.5 L.

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