Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 25 · 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 50800 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.A town has 54000 people. The population grows by 10% every year. What will the population be after 2 years?
3. 3.What amount will ₹52500 grow to in 2 years at 20% per year compound interest (in ₹)?
4. 4.What amount will ₹10000 grow to in 2 years at 12% per year compound interest (in ₹)?
5. 5.A scooter is worth ₹37600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
6. 6.A scooter is worth ₹30200. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹55600 at 5% per year for 2 years (in ₹)?
8. 8.What amount will ₹54600 grow to in 1 year at 12% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹3300 at 20% per year for 2 years, compounded every year (in ₹).
10. 10.What amount will ₹25900 grow to in 1 year at 5% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹60000 at 4% per year for 2 years (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹59300 at 10% per year for 2 years (in ₹)?
13. 13.What amount will ₹10000 grow to in 2 years at 8% per year compound interest (in ₹)?
14. 14.What amount will ₹47500 grow to in 1 year at 25% per year compound interest (in ₹)?
15. 15.Find the compound interest on ₹13600 at 10% per year for 1 year, compounded every year (in ₹).
16. 16.Find the compound interest on ₹53900 at 12% per year for 1 year, compounded every year (in ₹).
17. 17.A scooter is worth ₹18000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
18. 18.What amount will ₹54600 grow to in 1 year at 5% per year compound interest (in ₹)?
19. 19.What amount will ₹54400 grow to in 3 years at 25% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹48000 at 5% per year for 3 years, compounded every year (in ₹).
21. 21.What is the difference between the compound interest and the simple interest on ₹32500 at 8% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹44800 at 10% per year for 2 years (in ₹)?
23. 23.Find the compound interest on ₹52500 at 8% per year for 2 years, compounded every year (in ₹).
24. 24.A scooter is worth ₹32500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
25. 25.A scooter is worth ₹20000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
26. 26.Find the compound interest on ₹51300 at 5% per year for 1 year, compounded every year (in ₹).
27. 27.What is the difference between the compound interest and the simple interest on ₹60000 at 5% per year for 2 years (in ₹)?
28. 28.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
29. 29.What amount will ₹33500 grow to in 1 year at 10% per year compound interest (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹13900 at 10% per year for 2 years (in ₹)?
31. 31.Find the compound interest on ₹20000 at 8% per year for 2 years, compounded every year (in ₹).
32. 32.Find the compound interest on ₹27500 at 8% per year for 2 years, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹2400 at 5% per year for 2 years (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹59600 at 15% per year for 2 years (in ₹)?
35. 35.Find the compound interest on ₹22100 at 8% per year for 1 year, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹4000 at 5% per year for 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹42500 at 4% per year for 2 years (in ₹)?
38. 38.A town has 55500 people. The population grows by 20% every year. What will the population be after 1 year?
39. 39.What amount will ₹19000 grow to in 1 year at 5% per year compound interest (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹40800 at 10% per year for 2 years (in ₹)?

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