Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 199 · 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 scooter is worth ₹49200. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
2. 2.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
3. 3.What amount will ₹5000 grow to in 2 years at 8% per year compound interest (in ₹)?
4. 4.A scooter is worth ₹25600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
5. 5.What is the difference between the compound interest and the simple interest on ₹36000 at 5% per year for 2 years (in ₹)?
6. 6.What amount will ₹4800 grow to in 3 years at 25% per year compound interest (in ₹)?
7. 7.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
8. 8.What amount will ₹8700 grow to in 1 year at 4% per year compound interest (in ₹)?
9. 9.What is the difference between the compound interest and the simple interest on ₹16000 at 25% per year for 2 years (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹17600 at 5% per year for 2 years (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹14000 at 25% per year for 2 years (in ₹)?
12. 12.A scooter is worth ₹6500. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
13. 13.A scooter is worth ₹15000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹45000 at 10% per year for 2 years (in ₹)?
15. 15.Find the compound interest on ₹20800 at 15% per year for 2 years, compounded every year (in ₹).
16. 16.Find the compound interest on ₹19200 at 5% per year for 2 years, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹35600 at 5% per year for 2 years (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹49300 at 20% per year for 2 years (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹28000 at 15% per year for 2 years (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹19200 at 25% per year for 2 years (in ₹)?
21. 21.Find the compound interest on ₹31000 at 10% per year for 3 years, compounded every year (in ₹).
22. 22.What amount will ₹49200 grow to in 2 years at 20% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹36800 at 10% per year for 2 years (in ₹)?
25. 25.What amount will ₹26400 grow to in 2 years at 25% per year compound interest (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹20000 at 4% per year for 2 years (in ₹)?
27. 27.A town has 32500 people. The population grows by 25% every year. What will the population be after 1 year?
28. 28.A town has 21200 people. The population grows by 5% every year. What will the population be after 2 years?
29. 29.What is the difference between the compound interest and the simple interest on ₹44800 at 15% per year for 2 years (in ₹)?
30. 30.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
31. 31.What amount will ₹49000 grow to in 1 year at 4% per year compound interest (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹26600 at 10% per year for 2 years (in ₹)?
33. 33.A town has 35000 people. The population grows by 8% every year. What will the population be after 2 years?
34. 34.What is the difference between the compound interest and the simple interest on ₹56600 at 20% per year for 2 years (in ₹)?
35. 35.A town has 20000 people. The population grows by 10% every year. What will the population be after 3 years?
36. 36.What amount will ₹45800 grow to in 1 year at 10% per year compound interest (in ₹)?
37. 37.What amount will ₹26400 grow to in 1 year at 5% per year compound interest (in ₹)?
38. 38.A scooter is worth ₹18500. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
39. 39.Find the compound interest on ₹27700 at 10% per year for 1 year, compounded every year (in ₹).
40. 40.Find the compound interest on ₹32000 at 5% per year for 3 years, compounded every year (in ₹).

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