57 questions asked across 4 exam years, newest first
A sum of Rs. 10 is lent by a child to his friend to be returned in 11 monthly instalments of Rs. 1 each, the interest being simple. The rate of interest is:

Answer: B
What is the rate of interest per annum for simple interest at which Rs. 880 amounts to Rs. 913 in 1 years?

Answer: C
A sum of money doubles itself in 7 years at simple interest. In how much time will it become 5 times of itself?
Answer: B
Anuradha invests her money in a firm where the principal amount becomes 3 times in 10 years. What is the yearly rate of simple interest offered by the firm?
Answer: B
A certain amount will become six times in 20 years. How long does it take for the same amount to become 5 times? Assume the same rate of simple interest in each case.
Answer: D
A sum is deposited in a bank which gives simple interest. The sum becomes 1.25 times in 3 years. If there is a requirement of ₹7,60,000 after seven years, how much amount (in ₹) should one deposit to fulfil the requirement?
Answer: C
Find the simple interest on ₹2,700 for 8 months at 5 paisa per rupee per month?
Answer: D
The simple interest received on a sum is 25/36 of the sum. The number of years is equal to the annual rate of interest. What is the annual rate of interest?
Answer: D
A person lent Rs. 23000 to B for 3 years and Rs. 19000 to C for 4 years on simple interest at the same rate of interest and received Rs. 3625 in all from both of them as interest. What is the annual rate of interest?
Answer: C
A certain sum of money becomes triple of itself in 26 years at simple interest. In how many years it will becomes five times of itself?
Answer: B
A sum of money invested at simple interest becomes 17/10 of itself in 2 years and 6 months. What is the rate of interest per annum?
Answer: C
On simple interest a sum of Rs. 640 becomes Rs. 832 in 2 years. What will Rs. 860 become in 4 years at the same rate of simple interest?
Answer: B
₹2,500, when invested for 8 years at a given rate of simple interest per year, amounted to ₹3,725 on maturity. What was the rate of simple interest that was paid per annum?
Answer: B