Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 406 · 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 41200 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.What amount will ₹24000 grow to in 3 years at 10% per year compound interest (in ₹)?
3. 3.Find the compound interest on ₹42000 at 20% per year for 3 years, compounded every year (in ₹).
4. 4.Find the compound interest on ₹32600 at 10% per year for 2 years, compounded every year (in ₹).
5. 5.A town has 51300 people. The population grows by 12% every year. What will the population be after 1 year?
6. 6.What amount will ₹4000 grow to in 1 year at 20% per year compound interest (in ₹)?
7. 7.A scooter is worth ₹56000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
8. 8.A town has 46900 people. The population grows by 25% every year. What will the population be after 1 year?
9. 9.A town has 3200 people. The population grows by 4% every year. What will the population be after 1 year?
10. 10.What amount will ₹13200 grow to in 2 years at 10% per year compound interest (in ₹)?
11. 11.What amount will ₹28800 grow to in 3 years at 25% per year compound interest (in ₹)?
12. 12.Find the compound interest on ₹56000 at 25% per year for 3 years, compounded every year (in ₹).
13. 13.A town has 7900 people. The population grows by 15% every year. What will the population be after 1 year?
14. 14.A town has 49600 people. The population grows by 25% every year. What will the population be after 3 years?
15. 15.A town has 48000 people. The population grows by 15% every year. What will the population be after 3 years?
16. 16.Find the compound interest on ₹25000 at 10% per year for 3 years, compounded every year (in ₹).
17. 17.Find the compound interest on ₹22500 at 5% per year for 1 year, compounded every year (in ₹).
18. 18.What is the difference between the compound interest and the simple interest on ₹4900 at 20% per year for 2 years (in ₹)?
19. 19.Find the compound interest on ₹43800 at 12% per year for 1 year, compounded every year (in ₹).
20. 20.What amount will ₹19700 grow to in 1 year at 5% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹50400 at 20% per year for 2 years (in ₹)?
22. 22.What amount will ₹12000 grow to in 2 years at 5% per year compound interest (in ₹)?
23. 23.What amount will ₹31000 grow to in 3 years at 10% per year compound interest (in ₹)?
24. 24.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹21200 at 25% per year for 2 years (in ₹)?
26. 26.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
27. 27.What amount will ₹3900 grow to in 1 year at 5% per year compound interest (in ₹)?
28. 28.A town has 59800 people. The population grows by 8% every year. What will the population be after 1 year?
29. 29.What amount will ₹29700 grow to in 1 year at 15% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹5100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
31. 31.A town has 26400 people. The population grows by 25% every year. What will the population be after 2 years?
32. 32.What is the difference between the compound interest and the simple interest on ₹57000 at 10% per year for 2 years (in ₹)?
33. 33.What amount will ₹5400 grow to in 1 year at 10% per year compound interest (in ₹)?
34. 34.A town has 48000 people. The population grows by 5% every year. What will the population be after 3 years?
35. 35.What amount will ₹15600 grow to in 1 year at 8% per year compound interest (in ₹)?
36. 36.A scooter is worth ₹57500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
37. 37.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹55000 at 4% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹25000 at 4% per year for 2 years, compounded every year (in ₹).
40. 40.What is the difference between the compound interest and the simple interest on ₹26400 at 25% per year for 2 years (in ₹)?

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