Selected MCQ

Current Question
A sum becomes 7/5 of itself in 4 years. Find the rate of interest.
  • A. 9%
  • B. 10%
  • C. 11%
  • D. 12%
Correct Answer: B
Explanation:
Increase = 40% in 4 years ⇒ 10% yearly.
Related Question 1
A sum at compound interest becomes Rs. 800 in 3 years and Rs. 840 in 4 years. Find rate.
  • A. 2.5%
  • B. 4%
  • C. 5%
  • D. 6⅔%
Correct Answer: C
Explanation:
Annual growth rate derived.
Related Question 2
A sum at compound interest becomes Rs. 2420 in 2 years and Rs. 2662 in 3 years. Find rate.
  • A. 15%
  • B. 10%
  • C. 7.5%
  • D. 8%
Correct Answer: B
Explanation:
The ratio of amounts gives the rate.
Related Question 3
A sum becomes Rs. 9800 in 5 years and Rs. 12005 in 8 years. Find the rate of simple interest.
  • A. 5%
  • B. 8%
  • C. 12%
  • D. 15%
Correct Answer: C
Explanation:
A difference over time gives a rate.
Related Question 4
The simple interest on Rs. 12000 for 5 years is Rs. 7200. Find the compound interest for the same period and rate.
  • A. Rs. 3502.80
  • B. Rs. 3052.40
  • C. Rs. 3054.80
  • D. Rs. 3052.80
Correct Answer: D
Explanation:
Rate = 12%, apply the compound interest formula.
Related Question 5
If the difference between compound and simple interest for 2 years is Rs. 50 on Rs. 1000, find the rate?
  • A. 5%
  • B. 10%
  • C. 7%
  • D. 8%
Correct Answer: A
Explanation:
Difference = P(R/100)² → R = 5%.