1. At an annual simple interest rate of 10%, how much money will become 14,000 rupees in 4 years?

(a) ₹ 12500 (b) ₹ 12000 (c) ₹ 12600 (d) ₹ 10000

2. What will be the total amount of 450 rupees after 3 years at an annual simple interest rate of 4%?

(a) ₹ 135 (b) ₹ 180 (c) ₹ 504 (d) ₹ 600

3. 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?

4. 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

5. 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

6. At an annual simple interest rate of 8%, in how many years will 5000 rupees grow to 7400 rupees?

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

7. 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%

8. 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%

9. At what annual percentage rate of interest will the interest on an amount in 4 years become \(\cfrac{1}{6}\) of the total amount?

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

10. At an annual interest rate of 5%, in how many years will 520 rupees grow to 611 rupees?

(a) 5 years (b) 3\(\cfrac{1}{2}\) years (c) 10 years (d) 8 years

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

12. At an annual interest rate of 4%, what will be the total amount (including interest) on ₹450 after 3 years?

(a) ₹ 135 (b) ₹ 180 (c) ₹ 504 (d) ₹ 6000

13. A bank provides an annual simple interest rate of 5%. At the beginning of the year, Mr. Dip deposited 15,000 rupees. Three months later, he withdrew 3,000 rupees, and three months after withdrawing the amount, he deposited 4,000 rupees again. At the end of the year, how much money will Mr. Dip receive from the bank, including interest?

14. Jayantababu deposits 1500 rupees on the first day of each month in a monthly savings scheme. If the annual simple interest rate at the bank is 4%, then how much will he receive at the end of the year, including interest?

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

16. What is the compound amount for 10,000 rupees at an annual interest rate of 5% for \(2\cfrac{1}{2}\) years?

17. If the annual compound interest rate is \(r\%\), and the interest earned is _____, then the compound amount of \(p\) rupees in \(n\) years will be \(p\left(1+\cfrac{r}{400}\right)^{4n}\) rupees.

18. Due to the decrease in the annual simple interest rate from 4% to 3\(\frac{3}{4}\)%, a person's annual income decreases by 60 rupees. What is the principal amount of that person?

19. 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?

20. At an annual interest rate of 4%, for how much money will the difference between the simple interest and the compound interest for 2 years be 80 rupees? Let’s calculate and write it down.

21. Aman borrowed ₹25,000 for 3 years, with annual compound interest rates of 4% for the first year, 5% for the second year, and 6% for the third year. What amount will Aman repay (including principal and interest) at the end of 3 years?

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

(a) ₹ 120 (b) ₹ 200 (c) ₹ 240 (d) ₹ 20

23. At an annual interest rate of 5%, for how many years will the interest on 300 rupees amount to 120 rupees?

(a) 4 (b) 8 (c) 12 (d) 12\(\frac{1}{2}\)

24. If the total amount becomes 966 rupees at an annual simple interest rate of 3% in 5 years, the principal amount will be -

(a) 480 rupees (b) 408 rupees (c) 404 rupees (d) 840 rupees

25. At an annual simple interest rate of \(x\%\), if the interest on a principal amount for \(x\) years is \(x\) rupees, what is the principal amount?

(a) \(x\) rupees (b) \(100x\) rupees (c) \(\cfrac{100}{x}\) rupees (d) \(\cfrac{100}{x^2}\) rupees

26. 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

27. If the interest rate increases by 2%, how much principal amount will result in an additional interest of 300 rupees over 5 years?

(a) ₹ 2000 (b) ₹ 3000 (c) ₹ 4000 (d) ₹ 3600

28. At an interest rate of 4%, in how many years will 350 rupees earn 70 rupees in interest?

(a) 5 years (b) 10 years (c) 8 years (d) 7 years

29. 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

30. What should be the annual rate of simple interest (in percentage) so that the interest earned in 4 years becomes \( \frac{2}{5} \) of the principal amount?