Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 634 · 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.What is the difference between the compound interest and the simple interest on ₹20000 at 8% per year for 2 years (in ₹)?
2. 2.What amount will ₹55200 grow to in 1 year at 10% per year compound interest (in ₹)?
3. 3.Find the compound interest on ₹39300 at 10% per year for 2 years, compounded every year (in ₹).
4. 4.A town has 25500 people. The population grows by 20% every year. What will the population be after 3 years?
5. 5.What amount will ₹50400 grow to in 2 years at 20% per year compound interest (in ₹)?
6. 6.What amount will ₹54400 grow to in 2 years at 5% per year compound interest (in ₹)?
7. 7.Find the compound interest on ₹42400 at 25% per year for 2 years, compounded every year (in ₹).
8. 8.Find the compound interest on ₹6400 at 10% per year for 2 years, compounded every year (in ₹).
9. 9.Find the compound interest on ₹15300 at 20% per year for 1 year, compounded every year (in ₹).
10. 10.A town has 55600 people. The population grows by 5% every year. What will the population be after 2 years?
11. 11.A town has 3000 people. The population grows by 10% every year. What will the population be after 3 years?
12. 12.A scooter is worth ₹30900. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
13. 13.What amount will ₹6700 grow to in 1 year at 15% per year compound interest (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹56400 at 15% per year for 2 years (in ₹)?
15. 15.What amount will ₹17500 grow to in 2 years at 4% per year compound interest (in ₹)?
16. 16.A town has 32000 people. The population grows by 15% every year. What will the population be after 3 years?
17. 17.A town has 8000 people. The population grows by 15% every year. What will the population be after 1 year?
18. 18.What is the difference between the compound interest and the simple interest on ₹35600 at 15% per year for 2 years (in ₹)?
19. 19.A scooter is worth ₹59300. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
20. 20.A town has 18400 people. The population grows by 25% every year. What will the population be after 2 years?
21. 21.Find the compound interest on ₹38000 at 5% per year for 2 years, compounded every year (in ₹).
22. 22.What is the difference between the compound interest and the simple interest on ₹17500 at 4% per year for 2 years (in ₹)?
23. 23.A town has 32300 people. The population grows by 5% every year. What will the population be after 1 year?
24. 24.What is the difference between the compound interest and the simple interest on ₹4000 at 25% per year for 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹46700 at 10% per year for 2 years (in ₹)?
26. 26.A town has 7200 people. The population grows by 5% every year. What will the population be after 1 year?
27. 27.A scooter is worth ₹4400. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
28. 28.A town has 23100 people. The population grows by 12% every year. What will the population be after 1 year?
29. 29.What amount will ₹34400 grow to in 2 years at 10% per year compound interest (in ₹)?
30. 30.What amount will ₹39000 grow to in 1 year at 25% per year compound interest (in ₹)?
31. 31.Find the compound interest on ₹8000 at 25% per year for 3 years, compounded every year (in ₹).
32. 32.A town has 55800 people. The population grows by 15% every year. What will the population be after 1 year?
33. 33.Find the compound interest on ₹6400 at 25% per year for 2 years, compounded every year (in ₹).
34. 34.Find the compound interest on ₹30000 at 5% per year for 2 years, compounded every year (in ₹).
35. 35.Find the compound interest on ₹57600 at 25% per year for 2 years, compounded every year (in ₹).
36. 36.What amount will ₹39600 grow to in 2 years at 15% per year compound interest (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹56300 at 10% per year for 2 years (in ₹)?
38. 38.What amount will ₹17600 grow to in 2 years at 20% per year compound interest (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹30000 at 12% per year for 2 years (in ₹)?
40. 40.Find the compound interest on ₹18000 at 10% per year for 3 years, compounded every year (in ₹).

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