Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 336 · 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 ₹40000 at 12% per year for 2 years, compounded every year (in ₹).
2. 2.Find the compound interest on ₹30700 at 8% per year for 1 year, compounded every year (in ₹).
3. 3.A town has 43900 people. The population grows by 25% every year. What will the population be after 1 year?
4. 4.What is the difference between the compound interest and the simple interest on ₹47500 at 8% per year for 2 years (in ₹)?
5. 5.What amount will ₹45100 grow to in 1 year at 8% per year compound interest (in ₹)?
6. 6.A town has 23600 people. The population grows by 20% every year. What will the population be after 2 years?
7. 7.What is the difference between the compound interest and the simple interest on ₹55600 at 15% per year for 2 years (in ₹)?
8. 8.What amount will ₹47000 grow to in 3 years at 20% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹43200 at 4% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹24400 at 10% per year for 1 year, compounded every year (in ₹).
11. 11.A town has 10600 people. The population grows by 5% every year. What will the population be after 1 year?
12. 12.What amount will ₹10900 grow to in 2 years at 10% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹10700 at 10% per year for 2 years (in ₹)?
14. 14.Find the compound interest on ₹56000 at 20% per year for 2 years, compounded every year (in ₹).
15. 15.A scooter is worth ₹8700. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
16. 16.A scooter is worth ₹17500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
17. 17.A scooter is worth ₹37000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
18. 18.Find the compound interest on ₹14800 at 15% per year for 2 years, compounded every year (in ₹).
19. 19.What amount will ₹34000 grow to in 2 years at 5% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹57900 at 10% per year for 2 years, compounded every year (in ₹).
21. 21.A scooter is worth ₹22400. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
22. 22.A town has 34900 people. The population grows by 20% every year. What will the population be after 2 years?
23. 23.A scooter is worth ₹49600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
24. 24.Find the compound interest on ₹42000 at 4% per year for 1 year, compounded every year (in ₹).
25. 25.Find the compound interest on ₹46600 at 20% per year for 1 year, compounded every year (in ₹).
26. 26.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
27. 27.What amount will ₹14000 grow to in 3 years at 10% per year compound interest (in ₹)?
28. 28.What is the difference between the compound interest and the simple interest on ₹7300 at 10% per year for 2 years (in ₹)?
29. 29.What amount will ₹39600 grow to in 1 year at 25% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹38400. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
31. 31.Find the compound interest on ₹15800 at 12% per year for 1 year, compounded every year (in ₹).
32. 32.A town has 32500 people. The population grows by 8% every year. What will the population be after 2 years?
33. 33.A scooter is worth ₹48000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
34. 34.A town has 46500 people. The population grows by 20% every year. What will the population be after 1 year?
35. 35.A town has 41500 people. The population grows by 20% every year. What will the population be after 3 years?
36. 36.A scooter is worth ₹17000. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
38. 38.What amount will ₹56000 grow to in 3 years at 15% per year compound interest (in ₹)?
39. 39.A town has 22500 people. The population grows by 12% every year. What will the population be after 2 years?
40. 40.A town has 6800 people. The population grows by 20% every year. What will the population be after 1 year?

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