Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 3 · 40 sums

The method (Grow it every year): Year by year: new amount = amount × (100 + R) ÷ 100. Amount after T years = P × (1 + R/100)ᵀ; compound interest = amount − P. A value falling by R% each year: × (100 − R) ÷ 100 every year. For 2 years, CI − SI = P × R × R ÷ 10000.

1. 1.What is the difference between the compound interest and the simple interest on ₹42500 at 4% per year for 2 years (in ₹)?
2. 2.A town has 47800 people. The population grows by 4% every year. What will the population be after 1 year?
3. 3.What is the difference between the compound interest and the simple interest on ₹50800 at 25% per year for 2 years (in ₹)?
4. 4.What amount will ₹60000 grow to in 3 years at 10% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹5700 at 10% per year for 1 year, compounded every year (in ₹).
6. 6.What amount will ₹59100 grow to in 1 year at 20% per year compound interest (in ₹)?
7. 7.What amount will ₹4200 grow to in 1 year at 15% per year compound interest (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹3200 at 5% per year for 2 years (in ₹)?
9. 9.A scooter is worth ₹16100. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
10. 10.A town has 28500 people. The population grows by 20% every year. What will the population be after 3 years?
11. 11.A town has 57400 people. The population grows by 8% every year. What will the population be after 1 year?
12. 12.What is the difference between the compound interest and the simple interest on ₹7500 at 4% per year for 2 years (in ₹)?
13. 13.A scooter is worth ₹37000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
14. 14.A town has 12900 people. The population grows by 15% every year. What will the population be after 1 year?
15. 15.Find the compound interest on ₹38400 at 15% per year for 2 years, compounded every year (in ₹).
16. 16.Find the compound interest on ₹9400 at 10% per year for 1 year, compounded every year (in ₹).
17. 17.A town has 39500 people. The population grows by 25% every year. What will the population be after 1 year?
18. 18.Find the compound interest on ₹46000 at 10% per year for 1 year, compounded every year (in ₹).
19. 19.What is the difference between the compound interest and the simple interest on ₹24000 at 15% per year for 2 years (in ₹)?
20. 20.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹25000 at 12% per year for 2 years (in ₹)?
22. 22.What amount will ₹50600 grow to in 1 year at 25% per year compound interest (in ₹)?
23. 23.A scooter is worth ₹44700. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
24. 24.A scooter is worth ₹17400. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
25. 25.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
26. 26.A town has 27100 people. The population grows by 25% every year. What will the population be after 1 year?
27. 27.What amount will ₹25200 grow to in 1 year at 15% per year compound interest (in ₹)?
28. 28.What amount will ₹57500 grow to in 2 years at 12% per year compound interest (in ₹)?
29. 29.A scooter is worth ₹35000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
30. 30.A town has 9300 people. The population grows by 10% every year. What will the population be after 1 year?
31. 31.A scooter is worth ₹57600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
32. 32.A scooter is worth ₹58600. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
33. 33.What amount will ₹32800 grow to in 2 years at 25% per year compound interest (in ₹)?
34. 34.What amount will ₹55000 grow to in 3 years at 20% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹50000 at 4% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹13500 grow to in 3 years at 20% per year compound interest (in ₹)?
37. 37.What amount will ₹25800 grow to in 2 years at 10% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹60000 at 8% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
40. 40.What is the difference between the compound interest and the simple interest on ₹22500 at 4% per year for 2 years (in ₹)?

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