Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 107 · 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 ₹6800 at 12% per year for 1 year, compounded every year (in ₹).
2. 2.What is the difference between the compound interest and the simple interest on ₹34400 at 25% per year for 2 years (in ₹)?
3. 3.Find the compound interest on ₹24100 at 25% per year for 1 year, compounded every year (in ₹).
4. 4.A town has 32000 people. The population grows by 10% every year. What will the population be after 2 years?
5. 5.Find the compound interest on ₹42800 at 20% per year for 1 year, compounded every year (in ₹).
6. 6.A town has 50200 people. The population grows by 20% every year. What will the population be after 1 year?
7. 7.A town has 16400 people. The population grows by 20% every year. What will the population be after 2 years?
8. 8.A town has 20000 people. The population grows by 5% every year. What will the population be after 2 years?
9. 9.A town has 40000 people. The population grows by 5% every year. What will the population be after 3 years?
10. 10.Find the compound interest on ₹17500 at 12% per year for 2 years, compounded every year (in ₹).
11. 11.Find the compound interest on ₹47500 at 4% per year for 2 years, compounded every year (in ₹).
12. 12.Find the compound interest on ₹25200 at 10% per year for 2 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹54400 at 20% per year for 2 years, compounded every year (in ₹).
14. 14.What is the difference between the compound interest and the simple interest on ₹30000 at 4% per year for 2 years (in ₹)?
15. 15.Find the compound interest on ₹19200 at 15% per year for 2 years, compounded every year (in ₹).
16. 16.Find the compound interest on ₹12800 at 25% per year for 3 years, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹52400 at 25% per year for 2 years (in ₹)?
18. 18.Find the compound interest on ₹9600 at 12% per year for 1 year, compounded every year (in ₹).
19. 19.A town has 29600 people. The population grows by 20% every year. What will the population be after 2 years?
20. 20.Find the compound interest on ₹10200 at 15% per year for 1 year, compounded every year (in ₹).
21. 21.A town has 20800 people. The population grows by 25% every year. What will the population be after 3 years?
22. 22.What amount will ₹29100 grow to in 2 years at 10% per year compound interest (in ₹)?
23. 23.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
24. 24.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
25. 25.What amount will ₹50000 grow to in 3 years at 20% per year compound interest (in ₹)?
26. 26.A town has 46600 people. The population grows by 12% every year. What will the population be after 1 year?
27. 27.What amount will ₹17600 grow to in 2 years at 25% per year compound interest (in ₹)?
28. 28.A town has 40000 people. The population grows by 20% every year. What will the population be after 1 year?
29. 29.What is the difference between the compound interest and the simple interest on ₹40500 at 20% per year for 2 years (in ₹)?
30. 30.Find the compound interest on ₹21200 at 25% per year for 2 years, compounded every year (in ₹).
31. 31.What is the difference between the compound interest and the simple interest on ₹2500 at 8% per year for 2 years (in ₹)?
32. 32.Find the compound interest on ₹2000 at 10% per year for 3 years, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹13300 at 10% per year for 2 years (in ₹)?
34. 34.What amount will ₹59900 grow to in 1 year at 8% per year compound interest (in ₹)?
35. 35.What amount will ₹4500 grow to in 1 year at 5% per year compound interest (in ₹)?
36. 36.What amount will ₹56000 grow to in 3 years at 15% per year compound interest (in ₹)?
37. 37.What amount will ₹15200 grow to in 2 years at 15% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹10000 at 8% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹34100 at 25% per year for 1 year, compounded every year (in ₹).
40. 40.A scooter is worth ₹33000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?

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