Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 103 · 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 is the difference between the compound interest and the simple interest on ₹32100 at 10% per year for 2 years (in ₹)?
2. 2.A scooter is worth ₹21200. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
3. 3.What amount will ₹37000 grow to in 3 years at 10% per year compound interest (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹55000 at 12% per year for 2 years (in ₹)?
5. 5.Find the compound interest on ₹49300 at 12% per year for 1 year, compounded every year (in ₹).
6. 6.What amount will ₹58000 grow to in 1 year at 12% per year compound interest (in ₹)?
7. 7.A scooter is worth ₹15000. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
8. 8.What amount will ₹48400 grow to in 2 years at 25% per year compound interest (in ₹)?
9. 9.What amount will ₹32500 grow to in 2 years at 8% per year compound interest (in ₹)?
10. 10.What amount will ₹6300 grow to in 2 years at 20% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹32800 at 15% per year for 2 years, compounded every year (in ₹).
12. 12.Find the compound interest on ₹56800 at 15% per year for 2 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹48600 at 20% per year for 2 years, compounded every year (in ₹).
14. 14.Find the compound interest on ₹15000 at 20% per year for 3 years, compounded every year (in ₹).
15. 15.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
16. 16.A town has 57500 people. The population grows by 4% every year. What will the population be after 2 years?
17. 17.A scooter is worth ₹37500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
18. 18.What amount will ₹29200 grow to in 1 year at 15% per year compound interest (in ₹)?
19. 19.What amount will ₹5400 grow to in 1 year at 20% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹10000 at 4% per year for 2 years, compounded every year (in ₹).
21. 21.Find the compound interest on ₹49600 at 25% per year for 2 years, compounded every year (in ₹).
22. 22.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹32400 at 15% per year for 2 years (in ₹)?
24. 24.A town has 24000 people. The population grows by 5% every year. What will the population be after 3 years?
25. 25.Find the compound interest on ₹40400 at 4% per year for 1 year, compounded every year (in ₹).
26. 26.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
27. 27.Find the compound interest on ₹40000 at 25% per year for 3 years, compounded every year (in ₹).
28. 28.Find the compound interest on ₹5900 at 15% per year for 1 year, compounded every year (in ₹).
29. 29.Find the compound interest on ₹49600 at 25% per year for 1 year, compounded every year (in ₹).
30. 30.Find the compound interest on ₹37900 at 15% per year for 1 year, compounded every year (in ₹).
31. 31.Find the compound interest on ₹20000 at 20% per year for 3 years, compounded every year (in ₹).
32. 32.A town has 20000 people. The population grows by 10% every year. What will the population be after 3 years?
33. 33.Find the compound interest on ₹41900 at 5% per year for 1 year, compounded every year (in ₹).
34. 34.A scooter is worth ₹57200. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
35. 35.A town has 11700 people. The population grows by 12% every year. What will the population be after 1 year?
36. 36.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹52600 at 20% per year for 1 year, compounded every year (in ₹).
38. 38.What is the difference between the compound interest and the simple interest on ₹52500 at 8% per year for 2 years (in ₹)?
39. 39.A scooter is worth ₹36800. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
40. 40.Find the compound interest on ₹3800 at 10% per year for 2 years, compounded every year (in ₹).

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