1. A person deposits two separate amounts in a bank at an interest rate of 10% per annum for 5 years. At the end of the term, they receive a difference of 2500 rupees in interest. What was the difference in principal amounts?

(a) ₹ 2000 (b) ₹ 5000 (c) ₹ 10000 (d) ₹ 4000

2. Mr. Rathin deposits money in the bank for each of his two daughters in such a way that when each daughter turns 18 years old, she will receive ₹120000. The bank offers simple interest at an annual rate of 10%. The current ages of the daughters are 13 years and 8 years respectively. Calculate how much Mr. Rathin deposited in the bank for each daughter.

3. Rambabu deposited ₹5000 and ₹6000 separately in a bank. After 4 years, he noticed that the difference in interest earned was ₹400. What is the bank's interest rate?

(a) 4% (b) 3% (c) 10% (d) 24%

4. Bimal Kaku deposited 56,000 INR in a bank for his two sons, aged 13 and 15 years, in such a way that when they turn 18, the simple interest earned at an annual rate of 10% on each deposit equals the respective principal amount. Determine how much he deposited in each son's name.

5. Under the condition that no interest will be charged if the money is repaid within two years, three friends borrowed ₹6000, ₹8000, and ₹5000 respectively from a cooperative bank to jointly purchase four cycle rickshaws. After two years, after deducting all expenses, their total income amounted to ₹30,400. They divided this income in proportion to their capital contributions and then repaid their individual bank loans. Now, calculate how much money each person will have left in hand and what the ratio of the remaining amounts will be.

6. A person deposited ₹100 in a bank, and after 2 years received ₹121 as the total amount under compound interest. What is the annual percentage rate of compound interest?

7. A gentleman deposits a portion of his savings in a bank and the remaining in a post office under simple interest. The rates of simple interest in the bank and post office are 10% and 8% respectively. His total savings amount to ₹57,000. If he had deposited the entire amount in the bank, he would have earned ₹500 more in interest. What were the amounts he deposited in the bank and the post office?

8. Under the same rate of interest, the simple interest on ₹800 for 3 years and ₹1000 for 5 years together amounts to ₹592. What is the rate of interest?

(a) 6% (b) 8% (c) 7% (d) 9%

9. Mr. Bimal deposited ₹5,600 in a bank at a simple interest rate of 10% for his 13-year-old son and 15-year-old daughter in such a way that when both turn 18 years old, they each receive the same amount including interest. How much money did he deposit separately for his son and daughter?

10. If the annual interest rate is 9%, how much total interest will Bimal Babu receive if he deposits ₹800 for 3 years, ₹680 for 5 years, and ₹200 for 7 years in the bank?

(a) ₹ 468 (b) ₹ 648 (c) ₹ 846 (d) ₹ 684

11. If the difference between the compound interest and simple interest on a certain sum for 3 years at an annual rate of 10% is 930 rupees, then what is the principal amount?

12. If interest is compounded every 6 months, then at an annual compound interest rate of 10%, what is the total compound amount and compound interest on 8000 rupees for \(1\frac{1}{2}\) years?

13. At an annual simple interest rate of 5%, a person deposits some money in the bank. After 5 years, how much total amount will he receive, if the principal is 12,500 rupees less than the total amount (principal + interest?

14. Under the same simple interest rate, a principal amount grows to 7000 rupees in 5 years and 8200 rupees in 8 years. What is the rate of interest?

(a) 4% (b) 6% (c) 8% (d) 10%

15. If interest is compounded every 6 months, then at an annual compound interest rate of 10%, what will be the compound amount and compound interest on ₹8000 for 1½ years?

16. Raju lent ₹400 to Ajay for 2 years and ₹100 to Manoj for 4 years. He received a total of ₹60 as simple interest from both. What is the annual rate of simple interest?

17. Mr. Amal bequeaths ₹56,000 in his will for his two sons aged 13 and 15 in such a way that, when they each turn 18, the simple interest earned at an annual rate of 10% will be equal to the principal for each. What will be the allocated amount for each son in the will?

18. If the difference between the compound interest and simple interest on a certain sum of money for 3 years at an annual rate of 10% is ₹930, then what is the amount of that sum?

19. If ₹1400 is deposited in a bank with an interest rate of 6% for the first 4 years and 3% for the next 6 years, the interest received after 10 years will be-

(a) ₹ 120 (b) ₹ 588 (c) ₹ 230 (d) ₹ 448

20. The difference in interest for ₹840 and ₹1060 over 3 years at an annual rate of 12% is—

(a) ₹ 89.20 (b) ₹ 83 (c) ₹ 73 (d) ₹ 79.20

21. If the difference between the compound interest and simple interest on ₹1,400 for 2 years is ₹87.50, then what is the annual compound interest rate?

(a) 10% (b) 25% (c) 20% (d) 15%

22. If the difference between the compound interest and simple interest on a certain sum at a rate of 20% per annum for 3 years is ₹800, what is the principal amount?

(a) ₹ 5250 (b) ₹ 8650 (c) ₹ 6250 (d) none of the above

23. What is the difference between the compound interest and simple interest on ₹1950 at an annual interest rate of 8% for 2 years?

(a) ₹ 18 (b) ₹ 12.48 (c) ₹ 48.12 (d) ₹ 24

24. Determine the principal amount for which the difference between the simple interest and compound interest for 2 years at an annual rate of 4% is 80 rupees.

25. Rekhadidi deposited ₹10000 from her savings into two separate banks at the same time. One bank offers an annual simple interest rate of 6%, while the other offers 7%. If she received a total of ₹1280 as interest after 2 years, calculate and write how much she deposited in each bank.

26. A person deposited ₹100 in a bank, and after 2 years received a total of ₹121 with compound interest. What is the annual compound interest rate?

(a) 10% (b) 20% (c) 5% (d) \(10\cfrac{1}{2}\)%

27. If the interest is compounded semi-annually, what will be the compound amount on ₹10,000 for \(1\cfrac{1}{2}\) years, where the annual compound interest rates are 10% for the first period, 20% for the second period, and 40% for the third period?

28. If the interest on a principal amount becomes \(\cfrac{3}{8}\) of the principal in 5 years, what is the rate of interest?

(a) 6% (b) 7.5% (c) 8% (d) 10.5%

29. What time period will yield the same interest as 10000 rupees at 10% for 20 years, when invested at 8% on 25000 rupees?

(a) 8 years (b) 10 years (c) 12 years (d) 15 years

30. If 8000 rupees grows to 12000 rupees in 5 years with simple interest, what is the rate of interest?

(a) 8% (b) 10% (c) 12% (d) 15%