Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 458 · 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 16000 people. The population grows by 15% every year. What will the population be after 3 years?
2. 2.A scooter is worth ₹25000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
3. 3.A scooter is worth ₹43000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
4. 4.A town has 55000 people. The population grows by 12% every year. What will the population be after 2 years?
5. 5.A scooter is worth ₹46600. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
6. 6.Find the compound interest on ₹3100 at 5% per year for 1 year, compounded every year (in ₹).
7. 7.Find the compound interest on ₹3500 at 20% per year for 2 years, compounded every year (in ₹).
8. 8.What amount will ₹24800 grow to in 1 year at 4% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
10. 10.What amount will ₹21000 grow to in 3 years at 10% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹35700 at 10% per year for 2 years (in ₹)?
12. 12.A town has 43500 people. The population grows by 15% every year. What will the population be after 1 year?
13. 13.A scooter is worth ₹10400. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
14. 14.Find the compound interest on ₹38400 at 10% per year for 2 years, compounded every year (in ₹).
15. 15.What amount will ₹9900 grow to in 1 year at 25% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹47500 at 8% per year for 2 years (in ₹)?
17. 17.A town has 12500 people. The population grows by 10% every year. What will the population be after 1 year?
18. 18.Find the compound interest on ₹34000 at 20% per year for 3 years, compounded every year (in ₹).
19. 19.Find the compound interest on ₹4500 at 20% per year for 1 year, compounded every year (in ₹).
20. 20.What amount will ₹3300 grow to in 1 year at 15% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹22500 at 4% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹33700 at 10% per year for 2 years (in ₹)?
23. 23.Find the compound interest on ₹49200 at 5% per year for 2 years, compounded every year (in ₹).
24. 24.Find the compound interest on ₹12500 at 12% per year for 2 years, compounded every year (in ₹).
25. 25.A scooter is worth ₹52500. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
26. 26.What amount will ₹40000 grow to in 3 years at 15% per year compound interest (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹18400 at 25% per year for 2 years (in ₹)?
28. 28.What amount will ₹44200 grow to in 1 year at 25% per year compound interest (in ₹)?
29. 29.A town has 52500 people. The population grows by 20% every year. What will the population be after 3 years?
30. 30.A town has 15500 people. The population grows by 20% every year. What will the population be after 3 years?
31. 31.Find the compound interest on ₹27200 at 25% per year for 3 years, compounded every year (in ₹).
32. 32.What is the difference between the compound interest and the simple interest on ₹7600 at 25% per year for 2 years (in ₹)?
33. 33.Find the compound interest on ₹10200 at 8% per year for 1 year, compounded every year (in ₹).
34. 34.What amount will ₹47500 grow to in 2 years at 8% per year compound interest (in ₹)?
35. 35.What amount will ₹50100 grow to in 1 year at 8% per year compound interest (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹20800 at 10% per year for 2 years (in ₹)?
37. 37.A town has 45200 people. The population grows by 20% every year. What will the population be after 1 year?
38. 38.What amount will ₹20000 grow to in 3 years at 10% per year compound interest (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹60000 at 4% per year for 2 years (in ₹)?
40. 40.A town has 56000 people. The population grows by 25% every year. What will the population be after 3 years?

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