Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 249 · 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 ₹27800 at 25% per year for 1 year, compounded every year (in ₹).
2. 2.Find the compound interest on ₹36000 at 20% per year for 3 years, compounded every year (in ₹).
3. 3.A scooter is worth ₹42800. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
4. 4.What amount will ₹28300 grow to in 1 year at 5% per year compound interest (in ₹)?
5. 5.What amount will ₹48400 grow to in 1 year at 20% per year compound interest (in ₹)?
6. 6.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
7. 7.What is the difference between the compound interest and the simple interest on ₹12500 at 12% per year for 2 years (in ₹)?
8. 8.A town has 31200 people. The population grows by 5% every year. What will the population be after 2 years?
9. 9.A scooter is worth ₹35000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
10. 10.Find the compound interest on ₹10700 at 10% per year for 1 year, compounded every year (in ₹).
11. 11.What is the difference between the compound interest and the simple interest on ₹13200 at 25% per year for 2 years (in ₹)?
12. 12.What amount will ₹2500 grow to in 2 years at 8% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹46000 at 15% per year for 2 years (in ₹)?
14. 14.What amount will ₹12300 grow to in 1 year at 10% per year compound interest (in ₹)?
15. 15.A town has 55000 people. The population grows by 12% every year. What will the population be after 2 years?
16. 16.Find the compound interest on ₹9000 at 10% per year for 1 year, compounded every year (in ₹).
17. 17.Find the compound interest on ₹11300 at 25% per year for 1 year, compounded every year (in ₹).
18. 18.What is the difference between the compound interest and the simple interest on ₹5300 at 20% per year for 2 years (in ₹)?
19. 19.What amount will ₹52500 grow to in 2 years at 8% per year compound interest (in ₹)?
20. 20.A town has 31800 people. The population grows by 5% every year. What will the population be after 1 year?
21. 21.A scooter is worth ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
22. 22.What amount will ₹28800 grow to in 3 years at 25% per year compound interest (in ₹)?
23. 23.What amount will ₹56200 grow to in 1 year at 5% per year compound interest (in ₹)?
24. 24.A town has 50400 people. The population grows by 15% every year. What will the population be after 2 years?
25. 25.Find the compound interest on ₹39200 at 15% per year for 2 years, compounded every year (in ₹).
26. 26.What amount will ₹51900 grow to in 2 years at 10% per year compound interest (in ₹)?
27. 27.A town has 45000 people. The population grows by 8% every year. What will the population be after 2 years?
28. 28.A scooter is worth ₹56000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
29. 29.Find the compound interest on ₹18800 at 15% per year for 2 years, compounded every year (in ₹).
30. 30.What amount will ₹50400 grow to in 2 years at 10% per year compound interest (in ₹)?
31. 31.A scooter is worth ₹8000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
32. 32.A scooter is worth ₹43200. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
33. 33.Find the compound interest on ₹38200 at 20% per year for 1 year, compounded every year (in ₹).
34. 34.A town has 18900 people. The population grows by 10% every year. What will the population be after 2 years?
35. 35.What is the difference between the compound interest and the simple interest on ₹12900 at 20% per year for 2 years (in ₹)?
36. 36.A town has 6100 people. The population grows by 25% every year. What will the population be after 1 year?
37. 37.A scooter is worth ₹21500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
38. 38.Find the compound interest on ₹54100 at 10% per year for 1 year, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹22500 at 4% per year for 2 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹15200 at 15% per year for 2 years (in ₹)?

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