1. At an annual simple interest rate of 5%, what principal amount will yield a monthly interest of 1 rupee?

2. At an annual simple interest rate of \(6\cfrac{1}{4}\%\), how much principal amount will yield a daily interest of 1 rupee?

(a) ₹ 5840 (b) ₹ 6400 (c) ₹ 5000 (d) ₹ 6000

3. A farmer deposits ₹100 at the post office on the first day of every month. If the annual rate of simple interest is 5%, what will be the total amount (principal + interest) he receives at the end of the year?

4. At an annual compound interest rate of 5%, what principal amount will yield ₹315.25 as compound interest in 3 years?

5. Mr. Jayanta deposits ₹1,000 on the first day of every month in a monthly scheme. If the annual simple interest rate is 5%, then how much total amount (principal + interest) will he receive at the end of the year?

6. At an annual compound interest rate of 5%, what principal amount will yield a compound interest of 615 currency units in 2 years?

7. Jayanta deposits ₹1000 on the first day of each month into a monthly savings scheme. If the bank offers an annual simple interest rate of 5%, let's calculate the total amount (principal + interest) he will receive after 6 months.

8. What principal amount will generate ₹1 as simple interest for 1 day at an annual rate of 10%?

(a) ₹7300 (b) ₹1825 (c) ₹3650 (d) ₹10950

9. If the time period and the annual simple interest rate are equal, then at what annual interest rate will the interest amount be \(\cfrac{1}{25}\) of the principal?

(a) 25% (b) 10% (c) 2% (d) 2.5%

10. At an annual interest rate of 4%, what principal amount will yield at least ₹80 difference between simple interest and compound interest over 2 years?

11. If \(\frac{1}{6}\) of a principal amount is earned as annual simple interest, what will be the percentage rate of interest?

(a) 10\(\cfrac{2}{3}\%\) (b) 16\(\cfrac{2}{3}\%\) (c) 12% (d) 9\(\cfrac{2}{3}\%\)

12. 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?

13. Jayanta deposits ₹100 on the first day of each month in a monthly savings scheme. He continues this for one year. If the annual simple interest rate is 6%, how much total amount (principal + interest) will he receive at the end of the year?

14. Jayanta deposits 1,000 INR on the first day of each month in a monthly savings scheme. If the bank offers a 5% annual simple interest rate, what will be the total amount including interest after 6 months?

15. Determine the principal amount for which the monthly interest will be 10 rupees at an annual simple interest rate of 5%.

16. At an annual simple interest rate of 12%, what principal amount would generate a monthly interest of ₹100?

17. If the amount becomes ₹198 in 1 year from a principal of ₹180, what will be the annual simple interest rate?

18. 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?

19. At an annual simple interest rate of 6%, the interest for 5 months is \(\cfrac{x}{10}\) rupees. What will the principal be?

(a) ₹ 2x (b) ₹ 4x (c) ₹ 10x (d) ₹ 20x

20. If the annual simple interest on a principal is \(\cfrac{1}{9}\) of it, then what will be the accumulated amount in 4 years if the total sum becomes 1326 rupees?

(a) ₹ 1080 (b) ₹ 1120 (c) ₹ 918 (d) ₹ 750

21. At what annual percentage rate of interest will a principal amount double in 16\(\cfrac{2}{3}\) years?

(a) 4% (b) 5% (c) 6% (d) 8%

22. At what annual interest rate will the interest on a principal amount become \(\cfrac{5}{16}\) of the principal in 6\(\cfrac{1}{4}\) years?

(a) 3% (b) 4% (c) 5% (d) 6%

23. What annual rate of simple interest will make the interest on a sum over 10 years equal to \(\cfrac{2}{5}\) of the total amount?

(a) \(6\frac{1}{3}\%\) (b) \(6\%\) (c) \(6\frac{2}{3}\%\) (d) \(2\frac{1}{6}\%\)

24. If the simple interest on ₹850 for 3 years and on ₹1250 for 4 years at the same rate amounts to ₹302 in total, then what will be the annual rate of interest?

(a) 3% (b) 5% (c) 7% (d) None of the above

25. If a certain principal amount triples in 15 years at simple interest, then the annual rate of simple interest will be —

(a) \(13\frac{1}{3}\%\) (b) \(12\frac{1}{3}\%\) (c) \(11\frac{1}{3}\%\) (d) \(10\frac{1}{3}\%\)

26. Calculate the amount of money for which the monthly interest will be 1 rupee at an annual simple interest rate of 5%.

27. If the ratio of principal to amount after 1 year is 20 : 21, what is the annual rate of simple interest (in percentage)?

28. If the ratio of principal to amount after 1 year is 4:9, then the annual simple interest rate will be 5%.

29. If after one year the ratio of the principal to the amount (principal + interest) is 10 : 12, what is the annual rate of simple interest (in percentage)?

30. A bank gives simple interest at an annual rate of 5%. A person deposited ₹15,000 at the beginning of the year. After 3 months, he withdrew ₹3,000, and 3 months after the withdrawal, he deposited ₹8,000 again. Calculate the total amount (principal + interest) he will receive at the end of the year.