Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 832 · 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.What amount will ₹30000 grow to in 2 years at 8% per year compound interest (in ₹)?
2. 2.A town has 48000 people. The population grows by 10% every year. What will the population be after 3 years?
3. 3.A scooter is worth ₹25600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹4900 at 10% per year for 2 years (in ₹)?
5. 5.Find the compound interest on ₹15600 at 10% per year for 1 year, compounded every year (in ₹).
6. 6.Find the compound interest on ₹6100 at 20% per year for 2 years, compounded every year (in ₹).
7. 7.What is the difference between the compound interest and the simple interest on ₹50800 at 15% per year for 2 years (in ₹)?
8. 8.What amount will ₹11000 grow to in 3 years at 20% per year compound interest (in ₹)?
9. 9.A scooter is worth ₹54100. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
10. 10.What amount will ₹41400 grow to in 1 year at 12% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹32000 at 15% per year for 3 years, compounded every year (in ₹).
12. 12.Find the compound interest on ₹40800 at 4% per year for 1 year, compounded every year (in ₹).
13. 13.What amount will ₹16000 grow to in 3 years at 15% per year compound interest (in ₹)?
14. 14.A scooter is worth ₹45000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹5000 at 8% per year for 2 years (in ₹)?
16. 16.Find the compound interest on ₹20000 at 20% per year for 3 years, compounded every year (in ₹).
17. 17.Find the compound interest on ₹3000 at 10% per year for 3 years, compounded every year (in ₹).
18. 18.What amount will ₹6400 grow to in 2 years at 5% per year compound interest (in ₹)?
19. 19.A scooter is worth ₹13000. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
20. 20.A scooter is worth ₹10600. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
21. 21.What amount will ₹9200 grow to in 2 years at 15% per year compound interest (in ₹)?
22. 22.Find the compound interest on ₹12500 at 8% per year for 2 years, compounded every year (in ₹).
23. 23.A town has 46400 people. The population grows by 20% every year. What will the population be after 2 years?
24. 24.Find the compound interest on ₹8000 at 25% per year for 3 years, compounded every year (in ₹).
25. 25.Find the compound interest on ₹48400 at 25% per year for 2 years, compounded every year (in ₹).
26. 26.A town has 22600 people. The population grows by 4% every year. What will the population be after 1 year?
27. 27.What amount will ₹8900 grow to in 1 year at 25% per year compound interest (in ₹)?
28. 28.Find the compound interest on ₹52000 at 10% per year for 3 years, compounded every year (in ₹).
29. 29.A town has 39800 people. The population grows by 20% every year. What will the population be after 2 years?
30. 30.Find the compound interest on ₹6000 at 20% per year for 3 years, compounded every year (in ₹).
31. 31.A scooter is worth ₹32000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹34000 at 15% per year for 2 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹4000 at 5% per year for 2 years (in ₹)?
34. 34.A town has 58000 people. The population grows by 10% every year. What will the population be after 3 years?
35. 35.What is the difference between the compound interest and the simple interest on ₹32500 at 12% per year for 2 years (in ₹)?
36. 36.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
37. 37.A scooter is worth ₹18400. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹45000 at 12% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹17600 at 5% per year for 2 years, compounded every year (in ₹).
40. 40.Find the compound interest on ₹36800 at 25% per year for 3 years, compounded every year (in ₹).

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