Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 119 · 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 ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
2. 2.A town has 38000 people. The population grows by 20% every year. What will the population be after 3 years?
3. 3.What amount will ₹36800 grow to in 3 years at 25% per year compound interest (in ₹)?
4. 4.A scooter is worth ₹40000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
5. 5.A scooter is worth ₹57500. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
6. 6.Find the compound interest on ₹60000 at 15% per year for 2 years, compounded every year (in ₹).
7. 7.What amount will ₹38800 grow to in 2 years at 25% per year compound interest (in ₹)?
8. 8.What amount will ₹3700 grow to in 1 year at 25% per year compound interest (in ₹)?
9. 9.What amount will ₹54900 grow to in 1 year at 5% per year compound interest (in ₹)?
10. 10.Find the compound interest on ₹40000 at 8% per year for 2 years, compounded every year (in ₹).
11. 11.What is the difference between the compound interest and the simple interest on ₹48200 at 20% per year for 2 years (in ₹)?
12. 12.A scooter is worth ₹59400. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
13. 13.A scooter is worth ₹56000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹45200 at 20% per year for 2 years (in ₹)?
15. 15.A town has 50000 people. The population grows by 4% every year. What will the population be after 1 year?
16. 16.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹11100 at 20% per year for 2 years (in ₹)?
18. 18.A scooter is worth ₹4500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
19. 19.What amount will ₹5000 grow to in 2 years at 12% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹52400 at 15% per year for 2 years (in ₹)?
21. 21.What amount will ₹47000 grow to in 1 year at 15% per year compound interest (in ₹)?
22. 22.A scooter is worth ₹13000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
23. 23.What amount will ₹15000 grow to in 2 years at 12% per year compound interest (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
25. 25.What amount will ₹53600 grow to in 2 years at 25% per year compound interest (in ₹)?
26. 26.What amount will ₹11600 grow to in 2 years at 25% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹18400 at 25% per year for 2 years, compounded every year (in ₹).
28. 28.What amount will ₹5200 grow to in 1 year at 12% per year compound interest (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹29400 at 10% per year for 2 years (in ₹)?
30. 30.A town has 58400 people. The population grows by 25% every year. What will the population be after 2 years?
31. 31.A town has 22800 people. The population grows by 20% every year. What will the population be after 1 year?
32. 32.What amount will ₹4200 grow to in 1 year at 5% per year compound interest (in ₹)?
33. 33.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
34. 34.A scooter is worth ₹8000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
35. 35.What amount will ₹34300 grow to in 1 year at 8% per year compound interest (in ₹)?
36. 36.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
37. 37.What amount will ₹9000 grow to in 3 years at 10% per year compound interest (in ₹)?
38. 38.A town has 56000 people. The population grows by 15% every year. What will the population be after 3 years?
39. 39.What amount will ₹4000 grow to in 2 years at 25% per year compound interest (in ₹)?
40. 40.Find the compound interest on ₹41800 at 8% per year for 1 year, compounded every year (in ₹).

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