Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 74 · 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.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
2. 2.Find the compound interest on ₹55300 at 20% per year for 1 year, compounded every year (in ₹).
3. 3.Find the compound interest on ₹50000 at 25% per year for 2 years, compounded every year (in ₹).
4. 4.A town has 28000 people. The population grows by 20% every year. What will the population be after 3 years?
5. 5.Find the compound interest on ₹11800 at 8% per year for 1 year, compounded every year (in ₹).
6. 6.A town has 57000 people. The population grows by 10% every year. What will the population be after 3 years?
7. 7.What amount will ₹24000 grow to in 2 years at 15% per year compound interest (in ₹)?
8. 8.A town has 8600 people. The population grows by 20% every year. What will the population be after 2 years?
9. 9.What amount will ₹36700 grow to in 1 year at 25% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹5200 at 15% per year for 2 years (in ₹)?
11. 11.A scooter is worth ₹31100. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
12. 12.Find the compound interest on ₹26400 at 25% per year for 2 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹25600 at 15% per year for 2 years, compounded every year (in ₹).
14. 14.Find the compound interest on ₹6500 at 10% per year for 1 year, compounded every year (in ₹).
15. 15.A scooter is worth ₹11600. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
16. 16.Find the compound interest on ₹35000 at 8% per year for 1 year, compounded every year (in ₹).
17. 17.A town has 42600 people. The population grows by 25% every year. What will the population be after 1 year?
18. 18.What amount will ₹24000 grow to in 1 year at 8% per year compound interest (in ₹)?
19. 19.A town has 33600 people. The population grows by 25% every year. What will the population be after 2 years?
20. 20.A town has 32000 people. The population grows by 5% every year. What will the population be after 3 years?
21. 21.What amount will ₹3600 grow to in 1 year at 20% per year compound interest (in ₹)?
22. 22.What amount will ₹59900 grow to in 2 years at 10% per year compound interest (in ₹)?
23. 23.A town has 48000 people. The population grows by 5% every year. What will the population be after 3 years?
24. 24.What amount will ₹38000 grow to in 3 years at 10% per year compound interest (in ₹)?
25. 25.Find the compound interest on ₹2600 at 15% per year for 1 year, compounded every year (in ₹).
26. 26.What amount will ₹47600 grow to in 1 year at 4% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹37100 at 12% per year for 1 year, compounded every year (in ₹).
28. 28.What is the difference between the compound interest and the simple interest on ₹40000 at 12% per year for 2 years (in ₹)?
29. 29.What amount will ₹56800 grow to in 1 year at 25% per year compound interest (in ₹)?
30. 30.Find the compound interest on ₹57500 at 8% per year for 2 years, compounded every year (in ₹).
31. 31.A town has 32000 people. The population grows by 15% every year. What will the population be after 3 years?
32. 32.What amount will ₹34500 grow to in 1 year at 15% per year compound interest (in ₹)?
33. 33.Find the compound interest on ₹35200 at 25% per year for 3 years, compounded every year (in ₹).
34. 34.What amount will ₹28200 grow to in 1 year at 20% per year compound interest (in ₹)?
35. 35.A town has 52000 people. The population grows by 20% every year. What will the population be after 2 years?
36. 36.A town has 46400 people. The population grows by 15% every year. What will the population be after 2 years?
37. 37.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
38. 38.What amount will ₹12500 grow to in 2 years at 12% per year compound interest (in ₹)?
39. 39.A scooter is worth ₹26400. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
40. 40.A town has 45600 people. The population grows by 15% every year. What will the population be after 2 years?

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