Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 4 · 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 6800 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.Find the compound interest on ₹3300 at 5% per year for 1 year, compounded every year (in ₹).
3. 3.Find the compound interest on ₹37400 at 10% per year for 2 years, compounded every year (in ₹).
4. 4.What amount will ₹6200 grow to in 1 year at 12% per year compound interest (in ₹)?
5. 5.What is the difference between the compound interest and the simple interest on ₹60000 at 12% per year for 2 years (in ₹)?
6. 6.A scooter is worth ₹41700. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
7. 7.What amount will ₹16100 grow to in 1 year at 12% per year compound interest (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹37500 at 4% per year for 2 years (in ₹)?
9. 9.Find the compound interest on ₹21200 at 10% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹52100 at 10% per year for 1 year, compounded every year (in ₹).
11. 11.What amount will ₹60000 grow to in 3 years at 20% per year compound interest (in ₹)?
12. 12.Find the compound interest on ₹6400 at 25% per year for 3 years, compounded every year (in ₹).
13. 13.A town has 35600 people. The population grows by 25% every year. What will the population be after 2 years?
14. 14.A scooter is worth ₹10900. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
15. 15.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
16. 16.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹15200 at 25% per year for 2 years (in ₹)?
18. 18.What amount will ₹4800 grow to in 2 years at 5% per year compound interest (in ₹)?
19. 19.Find the compound interest on ₹25200 at 10% per year for 2 years, compounded every year (in ₹).
20. 20.What is the difference between the compound interest and the simple interest on ₹18800 at 10% per year for 2 years (in ₹)?
21. 21.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
22. 22.A town has 41600 people. The population grows by 25% every year. What will the population be after 3 years?
23. 23.A scooter is worth ₹52800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹7500 at 8% per year for 2 years (in ₹)?
25. 25.What amount will ₹16200 grow to in 2 years at 10% per year compound interest (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹35000 at 4% per year for 2 years (in ₹)?
27. 27.Find the compound interest on ₹38100 at 5% per year for 1 year, compounded every year (in ₹).
28. 28.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
29. 29.Find the compound interest on ₹37500 at 12% per year for 2 years, compounded every year (in ₹).
30. 30.Find the compound interest on ₹6400 at 15% per year for 2 years, compounded every year (in ₹).
31. 31.What is the difference between the compound interest and the simple interest on ₹18800 at 5% per year for 2 years (in ₹)?
32. 32.Find the compound interest on ₹32900 at 15% per year for 1 year, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹6900 at 20% per year for 2 years (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹43600 at 15% per year for 2 years (in ₹)?
35. 35.What is the difference between the compound interest and the simple interest on ₹57200 at 15% per year for 2 years (in ₹)?
36. 36.What amount will ₹48100 grow to in 1 year at 12% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹15700 at 20% per year for 1 year, compounded every year (in ₹).
38. 38.A scooter is worth ₹14400. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
39. 39.Find the compound interest on ₹55000 at 12% per year for 1 year, compounded every year (in ₹).
40. 40.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?

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