1.The simple interest on a certain principal for 3 years at an annual rate of 8% is equal to half the compound interest earned on Rs. 4000 over 2 years at 10% per annum. What is the principal amount invested at simple interest?
2.If the compound interest on a principal amount for 2 years at an annual rate of 10% is Rs. 525, what is the simple interest on the same principal for 4 years at an annual rate of 5%?
3.The compound interest on a principal amount for 2 years at an annual rate of 12.5% is Rs. 510. What is the simple interest on the same principal at the same rate and for the same duration?
4.What is the original principal amount that grows to Rs. 4913 in 3 years at an annual compound interest rate of 6.25%?
5.If Rs. 30,000 is invested at an annual compound interest rate of 7%, and the interest earned is Rs. 4,347, what is the duration of the investment in years?
6.What is the difference between the compound interest and simple interest on Rs. 1200 for one year at an annual rate of 10%, when interest is compounded semi-annually?
7.What is the difference between the compound interest and simple interest on Rs. 1000 at an annual rate of 10% over 4 years?
8.A principal amount earns Rs. 50 as simple interest over 2 years at an annual rate of 5%. What will be the compound interest on the same principal, at the same rate and time period?
9.Calculate the compound interest on Rs. 15,625 for a period of 9 months at an annual interest rate of 16%, compounded quarterly.
10.What is the difference in compound interest on Rs. 5000 for 1.5 years at an annual rate of 4% when compounded annually versus semi-annually?
11.If a principal amount doubles in value after 4 years at compound interest, how many years will it take for the amount to become eight times the original?
12.If a principal amount triples in 3 years under compound interest, after how many years will it become nine times the original amount?
13.If the compound interest on a certain principal amount for 2 years is Rs. 41 and the simple interest for the same period is Rs. 40, what is the annual interest rate?
14.If the simple interest on a certain principal at 4% per annum for 2 years is Rs. 80, what will be the compound interest on the same principal amount for the same duration?
15.Calculate the compound interest on Rs.1600 for a period of 9 months at an annual interest rate of 20%, compounded quarterly.
16.What is the compound interest earned on Rs. 20,000 after 3 years at an annual interest rate of 10%?
17.An amount of Rs. 8000 grows to Rs. 9261 at a compound interest rate of 5% per annum. How many years does it take for this growth?
18.Calculate the compound interest earned on a principal of Rs. 5000 at an annual interest rate of 4%, compounded half-yearly, over a period of 1.5 years.
19.If Rs. 7,500 is borrowed at a compound interest rate of 4% per annum, what will be the total amount payable after 2 years?
20.Calculate the compound interest and the total amount on Rs. 8000 invested at an annual interest rate of 5% for 3 years, with interest compounded yearly.