Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 90 · 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 ₹17600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
2. 2.What is the difference between the compound interest and the simple interest on ₹23900 at 10% per year for 2 years (in ₹)?
3. 3.A scooter is worth ₹2800. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
4. 4.What amount will ₹57100 grow to in 1 year at 25% per year compound interest (in ₹)?
5. 5.A town has 54400 people. The population grows by 5% every year. What will the population be after 1 year?
6. 6.Find the compound interest on ₹37400 at 4% per year for 1 year, compounded every year (in ₹).
7. 7.A town has 22000 people. The population grows by 5% every year. What will the population be after 2 years?
8. 8.A town has 17600 people. The population grows by 20% every year. What will the population be after 1 year?
9. 9.What amount will ₹2800 grow to in 2 years at 15% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹57200 at 15% per year for 2 years (in ₹)?
11. 11.A scooter is worth ₹49500. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
12. 12.Find the compound interest on ₹5000 at 8% per year for 2 years, compounded every year (in ₹).
13. 13.A town has 2500 people. The population grows by 12% every year. What will the population be after 2 years?
14. 14.A scooter is worth ₹43200. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹25200 at 15% per year for 2 years (in ₹)?
16. 16.Find the compound interest on ₹54400 at 15% per year for 2 years, compounded every year (in ₹).
17. 17.Find the compound interest on ₹59000 at 10% per year for 3 years, compounded every year (in ₹).
18. 18.Find the compound interest on ₹17700 at 20% per year for 1 year, compounded every year (in ₹).
19. 19.What is the difference between the compound interest and the simple interest on ₹2500 at 12% per year for 2 years (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹27500 at 8% per year for 2 years (in ₹)?
21. 21.What amount will ₹50000 grow to in 2 years at 5% per year compound interest (in ₹)?
22. 22.Find the compound interest on ₹18000 at 10% per year for 3 years, compounded every year (in ₹).
23. 23.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
24. 24.A scooter is worth ₹8200. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
25. 25.What amount will ₹40000 grow to in 3 years at 15% per year compound interest (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹30000 at 8% per year for 2 years (in ₹)?
27. 27.Find the compound interest on ₹6000 at 10% per year for 3 years, compounded every year (in ₹).
28. 28.Find the compound interest on ₹29900 at 20% per year for 1 year, compounded every year (in ₹).
29. 29.Find the compound interest on ₹42100 at 15% per year for 1 year, compounded every year (in ₹).
30. 30.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
31. 31.What is the difference between the compound interest and the simple interest on ₹5600 at 5% per year for 2 years (in ₹)?
32. 32.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
33. 33.What amount will ₹40400 grow to in 2 years at 10% per year compound interest (in ₹)?
34. 34.What amount will ₹10400 grow to in 2 years at 25% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹20000 at 4% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹15100 grow to in 1 year at 10% per year compound interest (in ₹)?
37. 37.What amount will ₹15700 grow to in 2 years at 10% per year compound interest (in ₹)?
38. 38.What amount will ₹30000 grow to in 2 years at 4% per year compound interest (in ₹)?
39. 39.A town has 54800 people. The population grows by 20% every year. What will the population be after 2 years?
40. 40.What amount will ₹45500 grow to in 1 year at 5% per year compound interest (in ₹)?

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