Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 21 · 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 ₹20600 at 4% per year for 1 year, compounded every year (in ₹).
2. 2.What amount will ₹60000 grow to in 2 years at 15% per year compound interest (in ₹)?
3. 3.What amount will ₹9200 grow to in 1 year at 10% per year compound interest (in ₹)?
4. 4.Find the compound interest on ₹44300 at 20% per year for 1 year, compounded every year (in ₹).
5. 5.Find the compound interest on ₹59200 at 10% per year for 1 year, compounded every year (in ₹).
6. 6.A town has 42600 people. The population grows by 20% every year. What will the population be after 1 year?
7. 7.What amount will ₹39000 grow to in 2 years at 20% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹35900 at 8% per year for 1 year, compounded every year (in ₹).
9. 9.What amount will ₹48000 grow to in 3 years at 15% per year compound interest (in ₹)?
10. 10.What amount will ₹18800 grow to in 1 year at 10% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
12. 12.A scooter is worth ₹25000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹58800 at 5% per year for 2 years (in ₹)?
14. 14.What amount will ₹59600 grow to in 2 years at 25% per year compound interest (in ₹)?
15. 15.What amount will ₹23400 grow to in 2 years at 20% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹54000 at 20% per year for 2 years (in ₹)?
17. 17.Find the compound interest on ₹36500 at 10% per year for 1 year, compounded every year (in ₹).
18. 18.What amount will ₹39000 grow to in 3 years at 10% per year compound interest (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹47600 at 15% per year for 2 years (in ₹)?
20. 20.Find the compound interest on ₹28300 at 10% per year for 1 year, compounded every year (in ₹).
21. 21.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
22. 22.A town has 43100 people. The population grows by 4% every year. What will the population be after 1 year?
23. 23.Find the compound interest on ₹58800 at 5% per year for 1 year, compounded every year (in ₹).
24. 24.What is the difference between the compound interest and the simple interest on ₹42500 at 12% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹32000 at 5% per year for 3 years, compounded every year (in ₹).
26. 26.A town has 60000 people. The population grows by 20% every year. What will the population be after 2 years?
27. 27.What amount will ₹15200 grow to in 2 years at 15% per year compound interest (in ₹)?
28. 28.What amount will ₹27500 grow to in 2 years at 12% per year compound interest (in ₹)?
29. 29.Find the compound interest on ₹32000 at 25% per year for 3 years, compounded every year (in ₹).
30. 30.A town has 43700 people. The population grows by 25% every year. What will the population be after 1 year?
31. 31.Find the compound interest on ₹31000 at 25% per year for 1 year, compounded every year (in ₹).
32. 32.Find the compound interest on ₹6300 at 10% per year for 1 year, compounded every year (in ₹).
33. 33.What amount will ₹6000 grow to in 3 years at 20% per year compound interest (in ₹)?
34. 34.What amount will ₹59400 grow to in 1 year at 10% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹6400 at 10% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹24000 grow to in 3 years at 5% per year compound interest (in ₹)?
37. 37.A scooter is worth ₹32300. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹25000 at 4% per year for 2 years (in ₹)?
39. 39.A town has 27500 people. The population grows by 12% every year. What will the population be after 2 years?
40. 40.A town has 43300 people. The population grows by 20% every year. What will the population be after 1 year?

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