Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 129 · 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 town has 19500 people. The population grows by 5% every year. What will the population be after 1 year?
2. 2.What is the difference between the compound interest and the simple interest on ₹24400 at 5% per year for 2 years (in ₹)?
3. 3.A town has 6400 people. The population grows by 15% every year. What will the population be after 2 years?
4. 4.Find the compound interest on ₹27500 at 8% per year for 2 years, compounded every year (in ₹).
5. 5.Find the compound interest on ₹33000 at 20% per year for 3 years, compounded every year (in ₹).
6. 6.A scooter is worth ₹34000. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
7. 7.What amount will ₹15000 grow to in 3 years at 10% per year compound interest (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹5000 at 12% per year for 2 years (in ₹)?
9. 9.What amount will ₹6000 grow to in 2 years at 15% per year compound interest (in ₹)?
10. 10.What amount will ₹16000 grow to in 2 years at 5% per year compound interest (in ₹)?
11. 11.A scooter is worth ₹40000. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
12. 12.A scooter is worth ₹2500. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
13. 13.Find the compound interest on ₹37500 at 20% per year for 3 years, compounded every year (in ₹).
14. 14.Find the compound interest on ₹38500 at 15% per year for 1 year, compounded every year (in ₹).
15. 15.A scooter is worth ₹52700. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹48400 at 15% per year for 2 years (in ₹)?
17. 17.A town has 6400 people. The population grows by 5% every year. What will the population be after 2 years?
18. 18.A town has 33300 people. The population grows by 20% every year. What will the population be after 1 year?
19. 19.Find the compound interest on ₹48000 at 15% per year for 3 years, compounded every year (in ₹).
20. 20.What amount will ₹16000 grow to in 3 years at 15% per year compound interest (in ₹)?
21. 21.A town has 41800 people. The population grows by 5% every year. What will the population be after 1 year?
22. 22.Find the compound interest on ₹19000 at 10% per year for 3 years, compounded every year (in ₹).
23. 23.Find the compound interest on ₹15900 at 10% per year for 1 year, compounded every year (in ₹).
24. 24.What is the difference between the compound interest and the simple interest on ₹59700 at 10% per year for 2 years (in ₹)?
25. 25.A town has 8000 people. The population grows by 5% every year. What will the population be after 3 years?
26. 26.What is the difference between the compound interest and the simple interest on ₹49600 at 25% per year for 2 years (in ₹)?
27. 27.Find the compound interest on ₹14400 at 25% per year for 2 years, compounded every year (in ₹).
28. 28.What is the difference between the compound interest and the simple interest on ₹32500 at 4% per year for 2 years (in ₹)?
29. 29.What amount will ₹4000 grow to in 3 years at 10% per year compound interest (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹18500 at 10% per year for 2 years (in ₹)?
31. 31.Find the compound interest on ₹5000 at 8% per year for 2 years, compounded every year (in ₹).
32. 32.What amount will ₹18300 grow to in 1 year at 25% per year compound interest (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹53600 at 25% per year for 2 years (in ₹)?
34. 34.Find the compound interest on ₹19100 at 12% per year for 1 year, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹25200 at 15% per year for 2 years (in ₹)?
36. 36.Find the compound interest on ₹22500 at 20% per year for 3 years, compounded every year (in ₹).
37. 37.Find the compound interest on ₹38400 at 10% per year for 1 year, compounded every year (in ₹).
38. 38.Find the compound interest on ₹58200 at 10% per year for 2 years, compounded every year (in ₹).
39. 39.What amount will ₹14400 grow to in 3 years at 25% per year compound interest (in ₹)?
40. 40.A scooter is worth ₹20000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?

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