1. What is sum of money that becomes Rs. 2250/- in 2 years at the rate of 121/2 percent per annum?

2. Find the rate of interest if the sum of Rs. 2750/- becomes Rs. 3570/- in two years six months?

3. Principal amount is Rs. 1020/-, rate of interest is 8% per annum, What shall be the amount in 3 years 4 months?

4. A certain sum of money amounts to Rs. 312/- at 4% simple interest per annum and Rs. 324/- at 8% simple interest per annum. Find the Principal and period of time?

5. If a certain sum amounts to Rs. 515 in three years and to Rs. 530 in 6 years, find sum and rate of interest.

6. In how many years the interest on Rs. 1200/- at 5% is equal to interest on Rs.800/- at 7.5% in 2.5 years?

7. In what time will the interest on Rs. 3600 at the rate of 10% be equal to the interest on Rs. 1800 at the rate of 121/2 % in 4 years?

8. In how many years certain sum amounts to (i) double (ii) three times to principal at the rate of 162/3%?

9. At what rate will the interest on Rs. 480 in 15 months equals the interest on Rs. 800 at 5% rate of interest in 9 months?

10. A man borrowed some money at 15% simple interest and cleared the debt at the end of 2 years 8 months, by paying Rs. 9240. Find the sum borrowed.

11. A sum of Rs. 450 amounts to Rs. 495 in 2 years. In what time will the sum of Rs. 820 amounts to Rs. 943 at the same rate?

12. In what time will Rs. 1250/- amount to Rs. 1400/- at 6% per annum?

13. If a certain sum doubles itself in 16 years at simple interest, in how many years will it triple itself?

14. Find the simple interest on a sum of Rs. 1000/- for 4 years at the rate of 3% per annum?

15. Find the simple interest on a sum of Rs. 250/- at 2% per annum for 4 years?

16. Find the simple interest on a sum of Rs. 4000/- for 6 months at the rate of 4% per annum?

17. Find the simple interest on a sum of Rs. 800/- for 4 years at the rate of 2 ½ % per annum?

18. Find the simple interest on a sum of Rs. 10/- for 4 months at the rate of 3 ps per rupee per month?

19. Find the simple interest on a sum of Rs. 125/- at the rate of 9% per annum from 25th February to 9th May, 1975?

20. Find the simple interest on a sum of Rs. 700/- at the rate of 2% per annum from 30th September, 1975 to 31st March, 1976?

21. Mahavir helped his friend by giving him Rs. 600/-. The rate of interest was 5% per annum. How much money will he return to Mahavir after 4 years?

22. The interest on Rs. 325/- for 3 years is Rs. 39/- Find the rate of interest per annum?

23. The simple interest on Rs. 1200/- for 5 years is RS. 360/-. Find the rate of interest per annum?

24. A bicycle costs Rs. 2500/- if purchased in cash. It can also be purchased by paying Rs. 250/- per month for a year. Determine the rate of interest?

25. If A gets three times the money invested at the end of 16 years, what is the rate of interest?

26. A sum of Rs. 400/- becomes RS. 480/- in 4 years. What will it amount to if the rate of interest is increased by 2%?

27. If Rs. 500/- becomes Rs. 540/- in 2 years, what is the rate of interest per cent per annum?

28. A sum of money lent out at simple interest amounts to Rs. 2520/- in 2 years and to Rs. 2700/- in 5 years. Find the rate of interest?

29. In what time the simple interest on Rs. 300/- at the rate of 5% p.a.is Rs. 30/-?

30. In what time will Rs. 1100/- amount to Rs. 1331/- at 5 ¼ % per annum?

31. In what time will the simple interest on RS. 800/- at 5% per annum be the same as the simple interest on RS. 500/- for 8 years at 4% per annum?

32. What sum of money will produce Rs. 286/- interest in 6 ½ years at 5% per annum?

33. A sum of money lent out at simple interest amounts to Rs. 440/- in 2 years and to Rs. 500/- in 5 years. Find the sum?

34. A man borrowed Rs. 1000/- at 6% per annum. At the end of 3 ½ years, he cleared his account by paying Rs. 360/- and a horse. What is the cost of the horse?

35. If the principal amount is Rs. 45/- and the rate of interest is 5% per annum, What shall be the interest in three years?

36. If the Principal amount is Rs. 1000/- and rate of interest is 6% per annum, what shall be the interest in 3 years six months?

37. On what Principal amount the simple interest payable shall be Rs. 50/- in 2 years at the rate of 5% per annum?

38. On what Principal amount the simple interest payable shall be Rs. 31.50 ps in one year 3 months at the rate of 51/4 % per annum?

39. Find the Principal amount if the simple interest paid is Rs. 312.75 ps in 2 years 3 months at the rate of 6.25% per annum?

40. What is the rate of interest per annum, if the interest payable is Rs. 3/- in two years on a sum of Rs. 60/-?

41. What is the rate of interest per annum, if the interest payable is Rs. 42/- in two years 4 months on a sum of Rs. 180/-?

42. What is the rate of interest per annum, if the interest payable is Rs. 90/- in two years 6 months on a sum of Rs. 1080/-?

43. In how many years a sum of Rs. 6500/- yields a simple interest of Rs. 455/- if the rate of interest is 21/3 %?

44. In how many years a sum of Rs. 1875/- yields a simple interest of Rs. 675/- if the rate of interest is 12%?

45. In how many years a sum of Rs. 6500/- becomes Rs. 7670/- at the rate of 6% per annum?