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. 198
C. Rs. 180
D. Rs. 207
Answer: Option A
Solution (By JKSSB Mock Tests)
A = 900 × (1.1)² = 900 × 1.21 = 1089, CI = 1089 − 900 = Rs. 189.

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Practice More Compound Interest Questions

Question #1
A sum of money at compound interest becomes 5 times in 5 years. In how many years will it become 125 times?
A. 20 years
B. 15 years
C. 12 years
D. 10 years

Correct Answer: Option B


Explanation:
125 = 5³, so 5 × 3 = 15 years.

This question belongs to: Maths Compound Interest
Question #2
The compound interest on Rs. 3000 at 8% per annum for 1 year compounded half-yearly is:
A. Rs. 248.00
B. Rs. 243.60
C. Rs. 240.00
D. Rs. 244.80

Correct Answer: Option D


Explanation:
Half-yearly rate 4%, n=2. A = 3000 × (1.04)² = 3000 × 1.0816 = 3244.80, CI = 3244.80 − 3000 = Rs. 244.80.

This question belongs to: Maths Compound Interest
Question #3
The compound interest on a certain sum of money for 2 years at 5% per annum is Rs. 615. What would be the simple interest on the same sum at the same rate for the same time?
A. Rs. 580
B. Rs. 600
C. Rs. 612
D. Rs. 610

Correct Answer: Option B


Explanation:
Effective rate of compound interest for 2 years at 5% = 5 + 5 + (55)/100 = 10.25%. Simple interest rate = 5 * 2 = 10%. Given 10.25% of sum = 615 => 1% of sum = 60. Simple Interest = 10% of sum = 10 * 60 = Rs. 600.

This question belongs to: Maths Compound Interest