Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 687 · 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 32000 people. The population grows by 15% every year. What will the population be after 3 years?
2. 2.A town has 31700 people. The population grows by 8% every year. What will the population be after 1 year?
3. 3.A scooter is worth ₹30000. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
4. 4.Find the compound interest on ₹54000 at 20% per year for 3 years, compounded every year (in ₹).
5. 5.What amount will ₹7000 grow to in 2 years at 20% per year compound interest (in ₹)?
6. 6.Find the compound interest on ₹2500 at 4% per year for 2 years, compounded every year (in ₹).
7. 7.What is the difference between the compound interest and the simple interest on ₹10400 at 15% per year for 2 years (in ₹)?
8. 8.Find the compound interest on ₹33900 at 10% per year for 2 years, compounded every year (in ₹).
9. 9.What amount will ₹16500 grow to in 1 year at 4% per year compound interest (in ₹)?
10. 10.What amount will ₹32500 grow to in 2 years at 8% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹37500 at 12% per year for 2 years, compounded every year (in ₹).
12. 12.What amount will ₹12100 grow to in 1 year at 25% per year compound interest (in ₹)?
13. 13.A town has 5600 people. The population grows by 8% every year. What will the population be after 1 year?
14. 14.Find the compound interest on ₹55000 at 12% per year for 2 years, compounded every year (in ₹).
15. 15.Find the compound interest on ₹15100 at 25% per year for 1 year, compounded every year (in ₹).
16. 16.What is the difference between the compound interest and the simple interest on ₹22800 at 5% per year for 2 years (in ₹)?
17. 17.A town has 16000 people. The population grows by 20% every year. What will the population be after 3 years?
18. 18.A town has 11500 people. The population grows by 10% every year. What will the population be after 2 years?
19. 19.Find the compound interest on ₹39800 at 20% per year for 2 years, compounded every year (in ₹).
20. 20.What is the difference between the compound interest and the simple interest on ₹47300 at 20% per year for 2 years (in ₹)?
21. 21.Find the compound interest on ₹2700 at 20% per year for 2 years, compounded every year (in ₹).
22. 22.What is the difference between the compound interest and the simple interest on ₹9600 at 5% per year for 2 years (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹52000 at 5% per year for 2 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹54600 at 10% per year for 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹25000 at 12% per year for 2 years (in ₹)?
26. 26.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
27. 27.Find the compound interest on ₹32800 at 25% per year for 2 years, compounded every year (in ₹).
28. 28.What is the difference between the compound interest and the simple interest on ₹20000 at 10% per year for 2 years (in ₹)?
29. 29.Find the compound interest on ₹48000 at 5% per year for 3 years, compounded every year (in ₹).
30. 30.What is the difference between the compound interest and the simple interest on ₹18800 at 5% per year for 2 years (in ₹)?
31. 31.Find the compound interest on ₹27400 at 5% per year for 1 year, compounded every year (in ₹).
32. 32.What amount will ₹19500 grow to in 3 years at 20% per year compound interest (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹47500 at 8% per year for 2 years (in ₹)?
34. 34.What amount will ₹24000 grow to in 3 years at 5% per year compound interest (in ₹)?
35. 35.What is the difference between the compound interest and the simple interest on ₹22200 at 10% per year for 2 years (in ₹)?
36. 36.Find the compound interest on ₹23600 at 5% per year for 2 years, compounded every year (in ₹).
37. 37.A town has 58000 people. The population grows by 20% every year. What will the population be after 2 years?
38. 38.What amount will ₹50000 grow to in 2 years at 8% per year compound interest (in ₹)?
39. 39.What amount will ₹49000 grow to in 2 years at 20% per year compound interest (in ₹)?
40. 40.A town has 35200 people. The population grows by 25% every year. What will the population be after 3 years?

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