Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 459 · 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 scooter is worth ₹8000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
2. 2.A town has 31900 people. The population grows by 10% every year. What will the population be after 2 years?
3. 3.A scooter is worth ₹46500. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
4. 4.What amount will ₹13000 grow to in 1 year at 12% per year compound interest (in ₹)?
5. 5.What amount will ₹58800 grow to in 2 years at 5% per year compound interest (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹7500 at 8% per year for 2 years (in ₹)?
7. 7.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹15100 at 10% per year for 2 years, compounded every year (in ₹).
9. 9.What amount will ₹12000 grow to in 1 year at 20% per year compound interest (in ₹)?
10. 10.A town has 20000 people. The population grows by 10% every year. What will the population be after 3 years?
11. 11.A scooter is worth ₹21000. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
12. 12.Find the compound interest on ₹40500 at 10% per year for 2 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹11100 at 20% per year for 2 years, compounded every year (in ₹).
14. 14.A scooter is worth ₹47200. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
15. 15.What amount will ₹35500 grow to in 3 years at 20% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹7500 at 4% per year for 2 years (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹4000 at 5% per year for 2 years (in ₹)?
18. 18.What amount will ₹35400 grow to in 2 years at 20% per year compound interest (in ₹)?
19. 19.A town has 59600 people. The population grows by 25% every year. What will the population be after 2 years?
20. 20.A scooter is worth ₹6000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
21. 21.Find the compound interest on ₹2500 at 8% per year for 2 years, compounded every year (in ₹).
22. 22.A town has 6500 people. The population grows by 8% every year. What will the population be after 1 year?
23. 23.A town has 52000 people. The population grows by 5% every year. What will the population be after 2 years?
24. 24.A town has 21600 people. The population grows by 12% every year. What will the population be after 1 year?
25. 25.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹22500 at 12% per year for 2 years (in ₹)?
27. 27.Find the compound interest on ₹21600 at 10% per year for 1 year, compounded every year (in ₹).
28. 28.What amount will ₹19600 grow to in 2 years at 15% per year compound interest (in ₹)?
29. 29.Find the compound interest on ₹9000 at 10% per year for 3 years, compounded every year (in ₹).
30. 30.A town has 24800 people. The population grows by 10% every year. What will the population be after 1 year?
31. 31.What is the difference between the compound interest and the simple interest on ₹48400 at 25% per year for 2 years (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹22000 at 20% per year for 2 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹51900 at 20% per year for 2 years (in ₹)?
34. 34.Find the compound interest on ₹22500 at 8% per year for 2 years, compounded every year (in ₹).
35. 35.A town has 22500 people. The population grows by 12% every year. What will the population be after 2 years?
36. 36.A scooter is worth ₹33600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹12500 at 8% per year for 2 years (in ₹)?
38. 38.A town has 10000 people. The population grows by 10% every year. What will the population be after 1 year?
39. 39.What is the difference between the compound interest and the simple interest on ₹12000 at 15% per year for 2 years (in ₹)?
40. 40.Find the compound interest on ₹43000 at 20% per year for 3 years, compounded every year (in ₹).

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