Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 17 · 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 ₹36800 at 25% per year for 2 years (in ₹)?
2. 2.A scooter is worth ₹48000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
3. 3.What is the difference between the compound interest and the simple interest on ₹19600 at 5% per year for 2 years (in ₹)?
4. 4.What amount will ₹8400 grow to in 1 year at 5% per year compound interest (in ₹)?
5. 5.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
7. 7.Find the compound interest on ₹18900 at 15% per year for 1 year, compounded every year (in ₹).
8. 8.Find the compound interest on ₹33900 at 15% per year for 1 year, compounded every year (in ₹).
9. 9.What amount will ₹53000 grow to in 3 years at 20% per year compound interest (in ₹)?
10. 10.What amount will ₹41300 grow to in 1 year at 10% per year compound interest (in ₹)?
11. 11.What amount will ₹57200 grow to in 1 year at 5% per year compound interest (in ₹)?
12. 12.A scooter is worth ₹9000. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
13. 13.Find the compound interest on ₹7800 at 10% per year for 1 year, compounded every year (in ₹).
14. 14.A town has 54000 people. The population grows by 10% every year. What will the population be after 3 years?
15. 15.What is the difference between the compound interest and the simple interest on ₹60000 at 8% per year for 2 years (in ₹)?
16. 16.A town has 40400 people. The population grows by 15% every year. What will the population be after 2 years?
17. 17.What is the difference between the compound interest and the simple interest on ₹36000 at 15% per year for 2 years (in ₹)?
18. 18.What amount will ₹12400 grow to in 2 years at 15% per year compound interest (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹55000 at 10% per year for 2 years (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹25000 at 8% per year for 2 years (in ₹)?
21. 21.A town has 11800 people. The population grows by 10% every year. What will the population be after 2 years?
22. 22.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?
23. 23.Find the compound interest on ₹32500 at 12% per year for 2 years, compounded every year (in ₹).
24. 24.Find the compound interest on ₹55000 at 25% per year for 1 year, compounded every year (in ₹).
25. 25.A scooter is worth ₹16000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
26. 26.What amount will ₹34400 grow to in 2 years at 25% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹20000 at 8% per year for 2 years, compounded every year (in ₹).
28. 28.Find the compound interest on ₹5000 at 20% per year for 3 years, compounded every year (in ₹).
29. 29.What amount will ₹8600 grow to in 2 years at 10% per year compound interest (in ₹)?
30. 30.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
31. 31.A scooter is worth ₹13600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
32. 32.A scooter is worth ₹42300. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
33. 33.A scooter is worth ₹5000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
34. 34.What amount will ₹27000 grow to in 3 years at 20% per year compound interest (in ₹)?
35. 35.A scooter is worth ₹37500. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
36. 36.Find the compound interest on ₹49700 at 12% per year for 1 year, compounded every year (in ₹).
37. 37.A town has 18000 people. The population grows by 20% every year. What will the population be after 3 years?
38. 38.A scooter is worth ₹30000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
39. 39.What amount will ₹7500 grow to in 2 years at 4% per year compound interest (in ₹)?
40. 40.Find the compound interest on ₹50400 at 25% per year for 2 years, compounded every year (in ₹).

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