If the compound interest on a sum for 2 years at 10% per annum is Rs. 525, find the sum. MCQ with Answer and Explanation

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If the compound interest on a sum for 2 years at 10% per annum is Rs. 525, find the sum.

A. Rs. 2200

B. Rs. 2500

C. Rs. 2400

D. Rs. 2000

Answer: Option B

Solution (By JKExamLibrary)

CI = P[(1.1)² - 1] = 0.21P = 525 → P = 2500.

This question belongs to: Maths Percentage

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Question #1

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In a mixture, the ratio of copper to zinc is 5:3. If 20% of the mixture is removed, what percentage of the remaining mixture is copper?

A. 50%

B. 62.5%

C. 60%

D. 70%

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Correct Answer: Option B

Explanation:
Removing part of the mixture does not change the ratio. Copper proportion = 5 / (5+3) = 5/8. Percentage = (5/8) * 100 = 62.5%.

This question belongs to: Maths Percentage

Question #2

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Office 60% men. 70% of men and 50% of women have car. % of workers with car:

A. 60%

B. 58%

C. 62%

D. 64%

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Correct Answer: Option C

Explanation:
Men with car = 42% of total, women = 20%, total 62%.

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Question #3

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A number is increased by 20% and then decreased by 25%. The result is 36 less than the original. Find the original number.

A. 360

B. 400

C. 320

D. 300

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Correct Answer: Option A

Explanation:
1.2 × 0.75 = 0.9. 0.9x = x - 36 → 0.1x = 36 → x = 360.

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