Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 403 · 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.Find the compound interest on ₹18600 at 5% per year for 1 year, compounded every year (in ₹).
2. 2.A town has 16000 people. The population grows by 5% every year. What will the population be after 3 years?
3. 3.A scooter is worth ₹5000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹28800 at 15% per year for 2 years (in ₹)?
5. 5.A town has 43600 people. The population grows by 5% every year. What will the population be after 2 years?
6. 6.Find the compound interest on ₹45000 at 10% per year for 3 years, compounded every year (in ₹).
7. 7.What amount will ₹6000 grow to in 3 years at 10% per year compound interest (in ₹)?
8. 8.A town has 9500 people. The population grows by 20% every year. What will the population be after 3 years?
9. 9.What amount will ₹37500 grow to in 2 years at 12% per year compound interest (in ₹)?
10. 10.Find the compound interest on ₹52200 at 20% per year for 1 year, compounded every year (in ₹).
11. 11.Find the compound interest on ₹26100 at 12% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹8000 at 15% per year for 3 years, compounded every year (in ₹).
13. 13.What is the difference between the compound interest and the simple interest on ₹19200 at 15% per year for 2 years (in ₹)?
14. 14.A town has 14500 people. The population grows by 10% every year. What will the population be after 2 years?
15. 15.Find the compound interest on ₹48000 at 5% per year for 3 years, compounded every year (in ₹).
16. 16.A town has 8000 people. The population grows by 15% every year. What will the population be after 3 years?
17. 17.A town has 7900 people. The population grows by 12% every year. What will the population be after 1 year?
18. 18.What amount will ₹29200 grow to in 2 years at 15% per year compound interest (in ₹)?
19. 19.What amount will ₹55500 grow to in 3 years at 20% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹56800 at 15% per year for 2 years (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹34800 at 15% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹10900 at 10% per year for 2 years (in ₹)?
23. 23.A scooter is worth ₹15900. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
24. 24.What amount will ₹57600 grow to in 2 years at 25% per year compound interest (in ₹)?
25. 25.A town has 51200 people. The population grows by 25% every year. What will the population be after 1 year?
26. 26.What is the difference between the compound interest and the simple interest on ₹52500 at 8% per year for 2 years (in ₹)?
27. 27.A scooter is worth ₹30600. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
28. 28.Find the compound interest on ₹6900 at 25% per year for 1 year, compounded every year (in ₹).
29. 29.What amount will ₹40400 grow to in 2 years at 25% per year compound interest (in ₹)?
30. 30.What amount will ₹36300 grow to in 1 year at 25% per year compound interest (in ₹)?
31. 31.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
32. 32.Find the compound interest on ₹34000 at 5% per year for 2 years, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹5300 at 20% per year for 2 years (in ₹)?
34. 34.A scooter is worth ₹41100. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
35. 35.What is the difference between the compound interest and the simple interest on ₹22000 at 5% per year for 2 years (in ₹)?
36. 36.A scooter is worth ₹48100. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
37. 37.A town has 14700 people. The population grows by 20% every year. What will the population be after 1 year?
38. 38.A scooter is worth ₹11500. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
39. 39.A town has 52100 people. The population grows by 12% every year. What will the population be after 1 year?
40. 40.Find the compound interest on ₹43500 at 10% per year for 2 years, compounded every year (in ₹).

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