Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 118 · 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 town has 55000 people. The population grows by 10% every year. What will the population be after 3 years?
2. 2.What amount will ₹8000 grow to in 1 year at 8% per year compound interest (in ₹)?
3. 3.Find the compound interest on ₹57500 at 12% per year for 2 years, compounded every year (in ₹).
4. 4.What amount will ₹8000 grow to in 3 years at 25% per year compound interest (in ₹)?
5. 5.A town has 56000 people. The population grows by 5% every year. What will the population be after 3 years?
6. 6.A scooter is worth ₹20000. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
7. 7.Find the compound interest on ₹8000 at 15% per year for 3 years, compounded every year (in ₹).
8. 8.A scooter is worth ₹20000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
9. 9.What amount will ₹27500 grow to in 2 years at 4% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹21200 at 25% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹48000 at 10% per year for 3 years, compounded every year (in ₹).
13. 13.What amount will ₹42200 grow to in 1 year at 25% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹12800 at 25% per year for 3 years, compounded every year (in ₹).
15. 15.A scooter is worth ₹47000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
16. 16.A scooter is worth ₹22000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
17. 17.What amount will ₹20800 grow to in 3 years at 25% per year compound interest (in ₹)?
18. 18.What amount will ₹56200 grow to in 1 year at 25% per year compound interest (in ₹)?
19. 19.What amount will ₹22500 grow to in 2 years at 8% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹2500 at 8% per year for 2 years, compounded every year (in ₹).
21. 21.A town has 48900 people. The population grows by 5% every year. What will the population be after 1 year?
22. 22.What amount will ₹51300 grow to in 1 year at 10% per year compound interest (in ₹)?
23. 23.Find the compound interest on ₹19000 at 10% per year for 3 years, compounded every year (in ₹).
24. 24.What amount will ₹60000 grow to in 2 years at 8% per year compound interest (in ₹)?
25. 25.A scooter is worth ₹24000. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹56800 at 15% per year for 2 years (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹13200 at 15% per year for 2 years (in ₹)?
28. 28.What amount will ₹14800 grow to in 2 years at 5% per year compound interest (in ₹)?
29. 29.Find the compound interest on ₹45000 at 5% per year for 1 year, compounded every year (in ₹).
30. 30.What amount will ₹54800 grow to in 1 year at 12% per year compound interest (in ₹)?
31. 31.A town has 57600 people. The population grows by 25% every year. What will the population be after 3 years?
32. 32.A scooter is worth ₹10800. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
33. 33.Find the compound interest on ₹5000 at 4% per year for 2 years, compounded every year (in ₹).
34. 34.Find the compound interest on ₹28000 at 20% per year for 3 years, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹20000 at 15% per year for 2 years (in ₹)?
36. 36.A scooter is worth ₹30000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
37. 37.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
38. 38.A town has 38700 people. The population grows by 10% every year. What will the population be after 2 years?
39. 39.What is the difference between the compound interest and the simple interest on ₹3200 at 10% per year for 2 years (in ₹)?
40. 40.A town has 6300 people. The population grows by 15% every year. What will the population be after 1 year?

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