Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 105 · 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 33900 people. The population grows by 4% every year. What will the population be after 1 year?
2. 2.What amount will ₹46700 grow to in 1 year at 10% per year compound interest (in ₹)?
3. 3.What amount will ₹10000 grow to in 2 years at 12% per year compound interest (in ₹)?
4. 4.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
5. 5.Find the compound interest on ₹11200 at 25% per year for 3 years, compounded every year (in ₹).
6. 6.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
7. 7.Find the compound interest on ₹8000 at 15% per year for 3 years, compounded every year (in ₹).
8. 8.What amount will ₹7000 grow to in 1 year at 25% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹5000 at 8% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹5000 at 8% per year for 2 years, compounded every year (in ₹).
11. 11.What is the difference between the compound interest and the simple interest on ₹17500 at 4% per year for 2 years (in ₹)?
12. 12.Find the compound interest on ₹27500 at 4% per year for 2 years, compounded every year (in ₹).
13. 13.Find the compound interest on ₹54900 at 20% per year for 1 year, compounded every year (in ₹).
14. 14.What amount will ₹17500 grow to in 3 years at 20% per year compound interest (in ₹)?
15. 15.Find the compound interest on ₹10400 at 15% per year for 2 years, compounded every year (in ₹).
16. 16.A town has 56000 people. The population grows by 5% every year. What will the population be after 3 years?
17. 17.A town has 26000 people. The population grows by 10% every year. What will the population be after 3 years?
18. 18.A town has 56000 people. The population grows by 10% every year. What will the population be after 3 years?
19. 19.What amount will ₹19300 grow to in 1 year at 25% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹57100 at 10% per year for 2 years (in ₹)?
21. 21.Find the compound interest on ₹27000 at 20% per year for 3 years, compounded every year (in ₹).
22. 22.What amount will ₹33700 grow to in 1 year at 12% per year compound interest (in ₹)?
23. 23.A town has 46400 people. The population grows by 15% every year. What will the population be after 1 year?
24. 24.What amount will ₹28400 grow to in 2 years at 15% per year compound interest (in ₹)?
25. 25.A scooter is worth ₹33600. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹2500 at 8% per year for 2 years (in ₹)?
27. 27.A scooter is worth ₹26000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
28. 28.A scooter is worth ₹14500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
29. 29.Find the compound interest on ₹32000 at 10% per year for 3 years, compounded every year (in ₹).
30. 30.A scooter is worth ₹15600. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
31. 31.Find the compound interest on ₹47700 at 15% per year for 1 year, compounded every year (in ₹).
32. 32.A scooter is worth ₹21700. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹57500 at 12% per year for 2 years (in ₹)?
34. 34.What amount will ₹20000 grow to in 2 years at 4% per year compound interest (in ₹)?
35. 35.A town has 14100 people. The population grows by 20% every year. What will the population be after 1 year?
36. 36.Find the compound interest on ₹46900 at 10% per year for 2 years, compounded every year (in ₹).
37. 37.What is the difference between the compound interest and the simple interest on ₹55200 at 15% per year for 2 years (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹20000 at 12% per year for 2 years (in ₹)?
39. 39.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
40. 40.Find the compound interest on ₹3800 at 10% per year for 2 years, compounded every year (in ₹).

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