Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 520 · 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 ₹22600. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
2. 2.What amount will ₹19000 grow to in 3 years at 20% per year compound interest (in ₹)?
3. 3.A town has 27000 people. The population grows by 20% every year. What will the population be after 3 years?
4. 4.What amount will ₹35800 grow to in 2 years at 10% per year compound interest (in ₹)?
5. 5.What is the difference between the compound interest and the simple interest on ₹39600 at 20% per year for 2 years (in ₹)?
6. 6.What amount will ₹56000 grow to in 3 years at 15% per year compound interest (in ₹)?
7. 7.Find the compound interest on ₹10800 at 25% per year for 2 years, compounded every year (in ₹).
8. 8.What is the difference between the compound interest and the simple interest on ₹37500 at 4% per year for 2 years (in ₹)?
9. 9.Find the compound interest on ₹43200 at 15% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹58400 at 5% per year for 2 years, compounded every year (in ₹).
11. 11.A scooter is worth ₹22000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹31000 at 20% per year for 2 years (in ₹)?
13. 13.What amount will ₹11400 grow to in 1 year at 5% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹12400 at 15% per year for 2 years, compounded every year (in ₹).
15. 15.What amount will ₹8100 grow to in 1 year at 8% per year compound interest (in ₹)?
16. 16.A town has 48000 people. The population grows by 15% every year. What will the population be after 3 years?
17. 17.What amount will ₹26700 grow to in 1 year at 4% per year compound interest (in ₹)?
18. 18.A town has 4400 people. The population grows by 25% every year. What will the population be after 2 years?
19. 19.What amount will ₹41300 grow to in 1 year at 5% per year compound interest (in ₹)?
20. 20.A town has 13300 people. The population grows by 25% every year. What will the population be after 1 year?
21. 21.Find the compound interest on ₹17800 at 12% per year for 1 year, compounded every year (in ₹).
22. 22.What amount will ₹43000 grow to in 3 years at 10% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹53200 at 15% per year for 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹33600 at 20% per year for 2 years (in ₹)?
26. 26.Find the compound interest on ₹11100 at 15% per year for 1 year, compounded every year (in ₹).
27. 27.What is the difference between the compound interest and the simple interest on ₹27500 at 8% per year for 2 years (in ₹)?
28. 28.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹13200 at 10% per year for 2 years (in ₹)?
30. 30.What amount will ₹28100 grow to in 2 years at 10% per year compound interest (in ₹)?
31. 31.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
32. 32.What is the difference between the compound interest and the simple interest on ₹34400 at 5% per year for 2 years (in ₹)?
33. 33.What amount will ₹36000 grow to in 3 years at 10% per year compound interest (in ₹)?
34. 34.A scooter is worth ₹53600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
35. 35.What amount will ₹36200 grow to in 1 year at 15% per year compound interest (in ₹)?
36. 36.What amount will ₹35000 grow to in 2 years at 8% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹59200 at 25% per year for 3 years, compounded every year (in ₹).
38. 38.What amount will ₹8000 grow to in 2 years at 25% per year compound interest (in ₹)?
39. 39.What amount will ₹42000 grow to in 3 years at 10% per year compound interest (in ₹)?
40. 40.A town has 32000 people. The population grows by 15% every year. What will the population be after 3 years?

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