A sum of money at compound interest doubles in 15 years. In how many years will it become 128 times? MCQ with Answer and Explanation

Question

Share Report Error

A sum of money at compound interest doubles in 15 years. In how many years will it become 128 times?

A. 105 years

B. 120 years

C. 90 years

D. 75 years

Answer: Option A

Solution (By JKSSB Mock Tests)

128 = 2⁷, so 15 × 7 = 105 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

The effective annual rate for 12% per annum compounded half-yearly is:

A. 12.36%

B. 12.25%

C. 12.50%

D. 12.60%

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
Effective = (1.06)² − 1 = 1.1236 − 1 = 12.36%.

This question belongs to: Maths Compound Interest

Question #2

Share Report

What sum will yield Rs. 410 as compound interest in 2 years at 5% per annum?

A. Rs. 4000

B. Rs. 4100

C. Rs. 3900

D. Rs. 3800

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option A

Explanation:
P = 410 / 0.1025 = 4000.

This question belongs to: Maths Compound Interest

Question #3

Share Report

The compound interest on a sum for 2 years at 8% is Rs. 665.60. The sum is:

A. Rs. 4400

B. Rs. 3800

C. Rs. 4000

D. Rs. 4200

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
CI = P × 0.1664 = 665.60 ⇒ P = 665.60 / 0.1664 = 4000.

This question belongs to: Maths Compound Interest

Explore All Compound Interest MCQs