Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 631 · 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.A town has 30800 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.What is the difference between the compound interest and the simple interest on ₹3600 at 5% per year for 2 years (in ₹)?
3. 3.What is the difference between the compound interest and the simple interest on ₹27200 at 5% per year for 2 years (in ₹)?
4. 4.A town has 29100 people. The population grows by 12% every year. What will the population be after 1 year?
5. 5.What is the difference between the compound interest and the simple interest on ₹8200 at 10% per year for 2 years (in ₹)?
6. 6.A town has 22500 people. The population grows by 8% every year. What will the population be after 2 years?
7. 7.What amount will ₹57600 grow to in 3 years at 25% per year compound interest (in ₹)?
8. 8.A town has 46400 people. The population grows by 20% every year. What will the population be after 2 years?
9. 9.What amount will ₹46400 grow to in 1 year at 10% per year compound interest (in ₹)?
10. 10.What amount will ₹2000 grow to in 2 years at 25% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹36400 at 4% per year for 1 year, compounded every year (in ₹).
12. 12.A town has 15000 people. The population grows by 8% every year. What will the population be after 2 years?
13. 13.What is the difference between the compound interest and the simple interest on ₹50000 at 8% per year for 2 years (in ₹)?
14. 14.Find the compound interest on ₹17100 at 8% per year for 1 year, compounded every year (in ₹).
15. 15.What amount will ₹29000 grow to in 1 year at 12% per year compound interest (in ₹)?
16. 16.A town has 35600 people. The population grows by 5% every year. What will the population be after 2 years?
17. 17.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹54400 at 25% per year for 2 years (in ₹)?
19. 19.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹60000 at 12% per year for 2 years (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹34800 at 25% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹4400 at 10% per year for 2 years (in ₹)?
23. 23.Find the compound interest on ₹37500 at 8% per year for 2 years, compounded every year (in ₹).
24. 24.What is the difference between the compound interest and the simple interest on ₹37300 at 20% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹2800 at 25% per year for 1 year, compounded every year (in ₹).
26. 26.What amount will ₹53300 grow to in 1 year at 4% per year compound interest (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹10200 at 10% per year for 2 years (in ₹)?
28. 28.Find the compound interest on ₹6600 at 20% per year for 2 years, compounded every year (in ₹).
29. 29.Find the compound interest on ₹29900 at 20% per year for 2 years, compounded every year (in ₹).
30. 30.Find the compound interest on ₹23200 at 20% per year for 2 years, compounded every year (in ₹).
31. 31.A town has 31500 people. The population grows by 20% every year. What will the population be after 3 years?
32. 32.Find the compound interest on ₹47300 at 12% per year for 1 year, compounded every year (in ₹).
33. 33.What amount will ₹51200 grow to in 2 years at 5% per year compound interest (in ₹)?
34. 34.What amount will ₹11700 grow to in 1 year at 15% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹51700 at 5% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹60000 grow to in 2 years at 4% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹25200 at 4% per year for 1 year, compounded every year (in ₹).
38. 38.A town has 48000 people. The population grows by 5% every year. What will the population be after 3 years?
39. 39.A scooter is worth ₹22500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
40. 40.Find the compound interest on ₹29000 at 10% per year for 3 years, compounded every year (in ₹).

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