Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 71 · 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 ₹8000 at 15% per year for 3 years, compounded every year (in ₹).
2. 2.What amount will ₹29000 grow to in 2 years at 20% per year compound interest (in ₹)?
3. 3.Find the compound interest on ₹40500 at 20% per year for 3 years, compounded every year (in ₹).
4. 4.A town has 15900 people. The population grows by 20% every year. What will the population be after 2 years?
5. 5.A town has 43300 people. The population grows by 4% every year. What will the population be after 1 year?
6. 6.Find the compound interest on ₹20800 at 8% per year for 1 year, compounded every year (in ₹).
7. 7.Find the compound interest on ₹27000 at 20% per year for 2 years, compounded every year (in ₹).
8. 8.What is the difference between the compound interest and the simple interest on ₹3500 at 10% per year for 2 years (in ₹)?
9. 9.A town has 15700 people. The population grows by 25% every year. What will the population be after 1 year?
10. 10.What amount will ₹2500 grow to in 2 years at 4% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹3600 at 25% per year for 2 years (in ₹)?
12. 12.Find the compound interest on ₹3400 at 10% per year for 1 year, compounded every year (in ₹).
13. 13.What amount will ₹52500 grow to in 2 years at 12% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹42000 at 20% per year for 3 years, compounded every year (in ₹).
15. 15.What amount will ₹34000 grow to in 2 years at 5% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹19200 at 15% per year for 2 years (in ₹)?
17. 17.Find the compound interest on ₹38900 at 4% per year for 1 year, compounded every year (in ₹).
18. 18.What is the difference between the compound interest and the simple interest on ₹25900 at 10% per year for 2 years (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
20. 20.A scooter is worth ₹36500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
21. 21.A scooter is worth ₹14400. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
22. 22.A town has 32000 people. The population grows by 5% every year. What will the population be after 3 years?
23. 23.A town has 11200 people. The population grows by 10% every year. What will the population be after 2 years?
24. 24.What amount will ₹33900 grow to in 1 year at 5% per year compound interest (in ₹)?
25. 25.What amount will ₹25000 grow to in 2 years at 12% per year compound interest (in ₹)?
26. 26.Find the compound interest on ₹27000 at 15% per year for 1 year, compounded every year (in ₹).
27. 27.A scooter is worth ₹28400. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
28. 28.A town has 14000 people. The population grows by 5% every year. What will the population be after 2 years?
29. 29.What amount will ₹60000 grow to in 2 years at 8% per year compound interest (in ₹)?
30. 30.Find the compound interest on ₹52300 at 10% per year for 1 year, compounded every year (in ₹).
31. 31.What amount will ₹46700 grow to in 1 year at 12% per year compound interest (in ₹)?
32. 32.Find the compound interest on ₹12700 at 5% per year for 1 year, compounded every year (in ₹).
33. 33.A town has 4000 people. The population grows by 20% every year. What will the population be after 2 years?
34. 34.Find the compound interest on ₹45500 at 25% per year for 1 year, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹42000 at 5% per year for 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹2500 at 12% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹16800 at 15% per year for 2 years, compounded every year (in ₹).
38. 38.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹34800 at 5% per year for 2 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹29200 at 15% per year for 2 years (in ₹)?

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