The compound interest on a certain sum of money for 2 years at 10% per annum is Rs. 1050. What would be the simple interest on the same sum at the same rate for the same time? MCQ with Answer and Explanation

The compound interest on a certain sum of money for 2 years at 10% per annum is Rs. 1050. What would be the simple interest on the same sum at the same rate for the same time?
A. Rs. 1000
B. Rs. 1040
C. Rs. 1025
D. Rs. 950
Answer: Option A
Solution (By JKSSB Mock Tests)
Effective rate of compound interest for 2 years at 10% = 10 + 10 + (1010)/100 = 21%. Simple interest rate = 10 * 2 = 20%. Given 21% of sum = 1050 => 1% of sum = 50. Simple Interest = 20% of sum = 20 * 50 = Rs. 1000.

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Practice More Compound Interest Questions

Question #1
Find the amount on Rs. 12500 at 8% per annum compound interest for 2 years.
A. Rs. 14620
B. Rs. 14640
C. Rs. 14600
D. Rs. 14580

Correct Answer: Option D


Explanation:
A = 12500 × (1.08)² = 12500 × 1.1664 = 14580.

This question belongs to: Maths Compound Interest
Question #2
The difference between simple interest and compound interest on a certain sum of money for 3 years at 10% per annum is Rs. 124. Find the sum.
A. Rs. 5000
B. Rs. 4000
C. Rs. 3500
D. Rs. 4500

Correct Answer: Option B


Explanation:
Difference for 3 years = P * (R/100)^2 * (3 + R/100) => 124 = P * (10/100)^2 * (3 + 10/100) => 124 = P * (1/100) * (3.1) => 124 = P * 0.031 => P = 124 / 0.031 = Rs. 4000.

This question belongs to: Maths Compound Interest
Question #3
A sum of money at compound interest doubles itself in 5 years. In how many years will it become 8 times?
A. 10 years
B. 15 years
C. 25 years
D. 20 years

Correct Answer: Option B


Explanation:
Doubles in 5 years; 8 = 2³, so time = 5 × 3 = 15 years.

This question belongs to: Maths Compound Interest