Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 873 · 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 amount will ₹30000 grow to in 3 years at 20% per year compound interest (in ₹)?
2. 2.What amount will ₹46000 grow to in 3 years at 10% per year compound interest (in ₹)?
3. 3.A town has 31200 people. The population grows by 5% every year. What will the population be after 2 years?
4. 4.A town has 55700 people. The population grows by 8% every year. What will the population be after 1 year?
5. 5.A town has 3900 people. The population grows by 12% every year. What will the population be after 1 year?
6. 6.A town has 45000 people. The population grows by 4% every year. What will the population be after 2 years?
7. 7.Find the compound interest on ₹11200 at 5% per year for 2 years, compounded every year (in ₹).
8. 8.Find the compound interest on ₹48100 at 10% per year for 1 year, compounded every year (in ₹).
9. 9.A town has 48100 people. The population grows by 15% every year. What will the population be after 1 year?
10. 10.What amount will ₹28100 grow to in 1 year at 20% per year compound interest (in ₹)?
11. 11.What amount will ₹14400 grow to in 2 years at 5% per year compound interest (in ₹)?
12. 12.A scooter is worth ₹3200. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
13. 13.What amount will ₹52800 grow to in 2 years at 5% per year compound interest (in ₹)?
14. 14.What amount will ₹35200 grow to in 2 years at 10% per year compound interest (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹57600 at 15% per year for 2 years (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
17. 17.A scooter is worth ₹37700. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
18. 18.Find the compound interest on ₹19300 at 12% per year for 1 year, compounded every year (in ₹).
19. 19.A town has 3600 people. The population grows by 25% every year. What will the population be after 1 year?
20. 20.A scooter is worth ₹4800. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
21. 21.Find the compound interest on ₹56800 at 10% per year for 1 year, compounded every year (in ₹).
22. 22.Find the compound interest on ₹16000 at 15% per year for 3 years, compounded every year (in ₹).
23. 23.What is the difference between the compound interest and the simple interest on ₹22500 at 4% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹48000 at 15% per year for 3 years, compounded every year (in ₹).
25. 25.A town has 55000 people. The population grows by 12% every year. What will the population be after 2 years?
26. 26.Find the compound interest on ₹20900 at 15% per year for 1 year, compounded every year (in ₹).
27. 27.What is the difference between the compound interest and the simple interest on ₹13600 at 25% per year for 2 years (in ₹)?
28. 28.What amount will ₹51000 grow to in 3 years at 10% per year compound interest (in ₹)?
29. 29.What amount will ₹15000 grow to in 1 year at 10% per year compound interest (in ₹)?
30. 30.What amount will ₹7700 grow to in 1 year at 8% per year compound interest (in ₹)?
31. 31.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
32. 32.What amount will ₹47600 grow to in 1 year at 10% per year compound interest (in ₹)?
33. 33.What amount will ₹50500 grow to in 1 year at 10% per year compound interest (in ₹)?
34. 34.A scooter is worth ₹50000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
35. 35.A town has 4300 people. The population grows by 25% every year. What will the population be after 1 year?
36. 36.What amount will ₹8700 grow to in 1 year at 12% per year compound interest (in ₹)?
37. 37.What amount will ₹51600 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 ₹3500 at 20% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹34800 at 15% per year for 1 year, compounded every year (in ₹).
40. 40.A town has 17500 people. The population grows by 20% every year. What will the population be after 1 year?

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