Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 77 · 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 54000 people. The population grows by 10% every year. What will the population be after 3 years?
2. 2.A scooter is worth ₹6000. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
3. 3.Find the compound interest on ₹17500 at 4% per year for 2 years, compounded every year (in ₹).
4. 4.A town has 41000 people. The population grows by 20% every year. What will the population be after 1 year?
5. 5.Find the compound interest on ₹25000 at 8% per year for 2 years, compounded every year (in ₹).
6. 6.What is the difference between the compound interest and the simple interest on ₹58800 at 25% per year for 2 years (in ₹)?
7. 7.What amount will ₹47000 grow to in 1 year at 4% per year compound interest (in ₹)?
8. 8.A scooter is worth ₹55000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
9. 9.Find the compound interest on ₹15100 at 10% per year for 1 year, compounded every year (in ₹).
10. 10.What is the difference between the compound interest and the simple interest on ₹57600 at 15% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹11500 at 20% per year for 1 year, compounded every year (in ₹).
12. 12.What is the difference between the compound interest and the simple interest on ₹57400 at 10% per year for 2 years (in ₹)?
13. 13.A scooter is worth ₹10800. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
14. 14.What amount will ₹57000 grow to in 3 years at 20% per year compound interest (in ₹)?
15. 15.What amount will ₹52500 grow to in 2 years at 4% per year compound interest (in ₹)?
16. 16.What amount will ₹13600 grow to in 1 year at 15% per year compound interest (in ₹)?
17. 17.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
18. 18.Find the compound interest on ₹10100 at 10% per year for 2 years, compounded every year (in ₹).
19. 19.Find the compound interest on ₹39700 at 25% per year for 1 year, compounded every year (in ₹).
20. 20.Find the compound interest on ₹51200 at 8% per year for 1 year, compounded every year (in ₹).
21. 21.Find the compound interest on ₹2500 at 20% per year for 3 years, compounded every year (in ₹).
22. 22.Find the compound interest on ₹55600 at 8% per year for 1 year, compounded every year (in ₹).
23. 23.A town has 52800 people. The population grows by 10% every year. What will the population be after 1 year?
24. 24.Find the compound interest on ₹38000 at 5% per year for 1 year, compounded every year (in ₹).
25. 25.What amount will ₹17600 grow to in 1 year at 8% per year compound interest (in ₹)?
26. 26.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
27. 27.A town has 45100 people. The population grows by 10% every year. What will the population be after 2 years?
28. 28.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
29. 29.What amount will ₹55500 grow to in 3 years at 20% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹19200. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
31. 31.What amount will ₹17300 grow to in 2 years at 10% per year compound interest (in ₹)?
32. 32.Find the compound interest on ₹56600 at 20% per year for 2 years, compounded every year (in ₹).
33. 33.What amount will ₹40500 grow to in 1 year at 8% per year compound interest (in ₹)?
34. 34.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹10000 at 4% per year for 2 years (in ₹)?
36. 36.Find the compound interest on ₹11800 at 4% per year for 1 year, compounded every year (in ₹).
37. 37.A town has 48400 people. The population grows by 12% every year. What will the population be after 1 year?
38. 38.What is the difference between the compound interest and the simple interest on ₹54800 at 20% per year for 2 years (in ₹)?
39. 39.What amount will ₹4600 grow to in 1 year at 20% per year compound interest (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹16700 at 10% per year for 2 years (in ₹)?

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