A sum of money at compound interest doubles in 10 years. In how many years will it become 32 times? MCQ with Answer and Explanation

Question

Share Report Error

A sum of money at compound interest doubles in 10 years. In how many years will it become 32 times?

A. 50 years

B. 45 years

C. 60 years

D. 40 years

Answer: Option A

Solution (By JKSSB Mock Tests)

32 = 2⁵, so 10 × 5 = 50 years.

This question belongs to: Maths Compound Interest

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Compound Interest Questions

Question #1

Share Report

What sum will amount to Rs. 1210 in 2 years at 10% per annum compound interest?

A. Rs. 1100

B. Rs. 1000

C. Rs. 1200

D. Rs. 900

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
P = 1210 / (1.1)² = 1210 / 1.21 = 1000.

This question belongs to: Maths Compound Interest

Question #2

Share Report

At what rate percent per annum will Rs. 64000 amount to Rs. 68921 in 3 years, compound interest compounded annually?

A. 5%

B. 6%

C. 2.5%

D. 4%

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Amount/Principal = 68921 / 64000 = (41 / 40)^3. Therefore, 1 + R/100 = 41/40 => R/100 = 1/40 => R = 2.5%.

This question belongs to: Maths Compound Interest

Question #3

Share Report

A sum of money triples itself in 6 years at compound interest. In how many years will it become 9 times?

A. 15 years

B. 12 years

C. 10 years

D. 9 years

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
3 times in 6 years, 9 = 3² ⇒ 6 × 2 = 12 years.

This question belongs to: Maths Compound Interest

Explore All Compound Interest MCQs