Population increases 6% annually. Present 1,50,000, after 2 years population: MCQ with Answer and Explanation

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Population increases 6% annually. Present 1,50,000, after 2 years population:

A. 1,70,000

B. 1,68,540

C. 1,65,000

D. 1,75,000

Answer: Option B

Solution (By JKSSB Mock Tests)

1,50,000 × 1.06² = 1,68,540.

This question belongs to: Maths Percentage

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Question #1

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If the price of petrol increases by 10%, by what percentage should a person decrease their usage to keep the budget unchanged?

A. 12%

B. 9.09%

C. 10%

D. 11.11%

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Correct Answer: Option B

Explanation:
Required decrease = (10 / 110) * 100 = 100 / 11 = 9.09%.

This question belongs to: Maths Percentage

Question #2

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Price of sugar increased 25%. A person buys 4 kg less for Rs. 100. Original price per kg was:

A. Rs. 4

B. Rs. 5

C. Rs. 6

D. Rs. 8

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Correct Answer: Option B

Explanation:
Original price x, xy=100. New 1.25x(y-4)=100 → 1.25×100 - 5x =100 → 125-5x=100 → x=5.

This question belongs to: Maths Percentage

Question #3

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A student multiplied a number by 2/3 instead of 3/2. What is the percentage error?

A. 66.66%

B. 44.44%

C. 50%

D. 55.55%

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Correct Answer: Option D

Explanation:
True = 3/2x. False = 2/3x. Error = (3/2 - 2/3)x = (5/6)x. % Error = ((5/6) / (3/2)) * 100 = (10/18) * 100 = 55.55%.

This question belongs to: Maths Percentage

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