Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 78 · 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 ₹6900 at 5% per year for 1 year, compounded every year (in ₹).
2. 2.What amount will ₹10800 grow to in 2 years at 10% per year compound interest (in ₹)?
3. 3.What is the difference between the compound interest and the simple interest on ₹36200 at 10% per year for 2 years (in ₹)?
4. 4.A scooter is worth ₹16000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
5. 5.What amount will ₹2100 grow to in 2 years at 20% per year compound interest (in ₹)?
6. 6.Find the compound interest on ₹37200 at 15% per year for 1 year, compounded every year (in ₹).
7. 7.A town has 28500 people. The population grows by 15% every year. What will the population be after 1 year?
8. 8.Find the compound interest on ₹53100 at 20% per year for 2 years, compounded every year (in ₹).
9. 9.A town has 28800 people. The population grows by 25% every year. What will the population be after 3 years?
10. 10.What is the difference between the compound interest and the simple interest on ₹50000 at 4% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹17600 at 12% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹12500 at 12% per year for 2 years, compounded every year (in ₹).
13. 13.A scooter is worth ₹36200. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
14. 14.What amount will ₹22500 grow to in 2 years at 4% per year compound interest (in ₹)?
15. 15.What amount will ₹6400 grow to in 3 years at 25% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹46800 at 5% per year for 2 years (in ₹)?
17. 17.A town has 41500 people. The population grows by 20% every year. What will the population be after 3 years?
18. 18.What is the difference between the compound interest and the simple interest on ₹50000 at 8% per year for 2 years (in ₹)?
19. 19.A town has 57900 people. The population grows by 10% every year. What will the population be after 1 year?
20. 20.A town has 5900 people. The population grows by 10% every year. What will the population be after 1 year?
21. 21.A scooter is worth ₹49200. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
22. 22.What amount will ₹29100 grow to in 1 year at 10% per year compound interest (in ₹)?
23. 23.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
24. 24.Find the compound interest on ₹42500 at 12% per year for 2 years, compounded every year (in ₹).
25. 25.Find the compound interest on ₹12500 at 8% per year for 2 years, compounded every year (in ₹).
26. 26.What is the difference between the compound interest and the simple interest on ₹18800 at 20% per year for 2 years (in ₹)?
27. 27.A scooter is worth ₹36800. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
28. 28.A scooter is worth ₹5600. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
29. 29.Find the compound interest on ₹26000 at 12% per year for 1 year, compounded every year (in ₹).
30. 30.What is the difference between the compound interest and the simple interest on ₹35000 at 8% per year for 2 years (in ₹)?
31. 31.A town has 40600 people. The population grows by 10% every year. What will the population be after 1 year?
32. 32.What amount will ₹20100 grow to in 1 year at 25% per year compound interest (in ₹)?
33. 33.Find the compound interest on ₹13900 at 20% per year for 2 years, compounded every year (in ₹).
34. 34.A town has 25600 people. The population grows by 25% every year. What will the population be after 3 years?
35. 35.Find the compound interest on ₹27500 at 12% per year for 2 years, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹54400 at 5% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹57500 at 8% per year for 2 years, compounded every year (in ₹).
38. 38.What amount will ₹54400 grow to in 3 years at 25% per year compound interest (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹42500 at 8% per year for 2 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹37500 at 4% per year for 2 years (in ₹)?

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