The compound interest on Rs. 900 at 10% per annum for 2 years is: MCQ with Answer and Explanation

The compound interest on Rs. 900 at 10% per annum for 2 years is:

A. Rs. 189

B. Rs. 180

C. Rs. 207

D. Rs. 198

Answer: Option A

A = 900 × (1.1)² = 900 × 1.21 = 1089, CI = 1089 − 900 = Rs. 189.

This question belongs to: Maths Compound Interest

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Question #1 Report Error

A sum of money at compound interest becomes 6 times in 4 years. In how many years will it become 216 times?

A. 8 years

B. 10 years

C. 12 years

D. 16 years

Correct Answer: Option C

Explanation:
216 = 6³, so 4 × 3 = 12 years.

This question belongs to: Maths Compound Interest

Question #2 Report Error

The difference between CI and SI on Rs. 8400 for 2 years at 5% is:

A. Rs. 19

B. Rs. 21

C. Rs. 18

D. Rs. 20

Correct Answer: Option B

Explanation:
D = 8400 × 0.0025 = Rs. 21.

This question belongs to: Maths Compound Interest

Question #3 Report Error

A sum of money at compound interest becomes 2.25 times in 2 years. The rate of interest is:

A. 55%

B. 40%

C. 45%

D. 50%

Correct Answer: Option D

Explanation:
(1+r)² = 2.25 ⇒ 1+r = 1.5 ⇒ r = 50%.

This question belongs to: Maths Compound Interest