1.A principal amount grows to Rs. 6690 in 3 years and Rs. 10,035 in 6 years under compound interest. What is the original principal?
2.A principal amount grows to Rs. 2916 after 2 years and to Rs. 3149.28 after 3 years under compound interest. What is the original principal?
3.A principal amount grows to Rs. 10,648 after 3 years and to Rs. 9,680 after 2 years. What is the annual rate of interest?
4.If the difference between simple interest and compound interest on Rs. 5000 for 2 years is Rs. 72, what is the rate of interest?
5.If the compound interest on a principal amount for 2 years at an annual rate of 10% is Rs.420, what will be the simple interest on the same principal, at the same rate and for the same duration?
6.If the difference between compound interest and simple interest on a certain principal at 5% per annum for 2 years is Rs. 1.50, what is the principal amount?
7.What is the principal sum that yields Rs. 132 as compound interest during the second year at an annual interest rate of 10%?
8.If Rs. 800 is invested at a compound interest rate of 5% per annum, after how many years will the amount grow to Rs. 882?
9.If the simple interest on a principal amount at an annual rate of 4% for 2 years is Rs. 80, what will be the compound interest on the same principal over the same duration?
10.If Rs. 7500 is borrowed at an annual compound interest rate of 4%, what will be the total amount payable after 2 years?
11.The difference between the compound interest and simple interest on Rs. 15,000 for a period of 2 years is Rs. 96. What is the annual rate of interest?
12.A certain amount of money is borrowed and repaid in two equal yearly installments of Rs. 882 each with a compound interest rate of 5%. What was the original amount borrowed?
13.What equal yearly installment will clear a debt of Rs. 1025 payable after 2 years, given a compound interest rate of 5%?
14.What is the minimum number of full years required for an investment to more than double at a compound interest rate of 20% per annum?
15.If a principal amount invested at compound interest doubles in 5 years, how long will it take to become eight times the original amount at the same interest rate?
16.An amount invested at compound interest grows to Rs. 800 after 3 years and to Rs. 840 after 4 years. What is the annual interest rate?
17.What is the effective annual interest rate equivalent to a nominal rate of 6% per year compounded semi-annually?
18.A certain principal amount yields Rs. 660 as simple interest over 2 years, while the compound interest for the same period is Rs. 696.30. If the interest rate remains constant in both cases, what is the rate of interest?
19.What is the principal amount (in Rs.) if the difference between the simple interest and compound interest (compounded annually) on it for 2 years at a rate of 4% per annum is Rs. 1?
20.An amount increases by 60% in 6 years under simple interest. What will be the compound interest on Rs. 12,000 after 3 years at the same interest rate?