Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 521 · 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 20000 people. The population grows by 12% every year. What will the population be after 2 years?
2. 2.Find the compound interest on ₹40000 at 20% per year for 3 years, compounded every year (in ₹).
3. 3.Find the compound interest on ₹22400 at 15% per year for 2 years, compounded every year (in ₹).
4. 4.What is the difference between the compound interest and the simple interest on ₹15200 at 5% per year for 2 years (in ₹)?
5. 5.Find the compound interest on ₹24000 at 5% per year for 3 years, compounded every year (in ₹).
6. 6.Find the compound interest on ₹12300 at 20% per year for 2 years, compounded every year (in ₹).
7. 7.What is the difference between the compound interest and the simple interest on ₹36000 at 25% per year for 2 years (in ₹)?
8. 8.Find the compound interest on ₹53500 at 12% per year for 1 year, compounded every year (in ₹).
9. 9.What amount will ₹39600 grow to in 2 years at 10% per year compound interest (in ₹)?
10. 10.A scooter is worth ₹37200. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
11. 11.Find the compound interest on ₹28800 at 25% per year for 3 years, compounded every year (in ₹).
12. 12.What amount will ₹13500 grow to in 1 year at 25% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹7200 at 5% per year for 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹16400 at 25% per year for 2 years (in ₹)?
15. 15.What amount will ₹34400 grow to in 2 years at 15% per year compound interest (in ₹)?
16. 16.A town has 46300 people. The population grows by 8% every year. What will the population be after 1 year?
17. 17.A town has 10400 people. The population grows by 20% every year. What will the population be after 1 year?
18. 18.Find the compound interest on ₹57900 at 4% per year for 1 year, compounded every year (in ₹).
19. 19.What is the difference between the compound interest and the simple interest on ₹45000 at 12% per year for 2 years (in ₹)?
20. 20.Find the compound interest on ₹42200 at 15% per year for 1 year, compounded every year (in ₹).
21. 21.What is the difference between the compound interest and the simple interest on ₹36000 at 5% per year for 2 years (in ₹)?
22. 22.What amount will ₹39600 grow to in 1 year at 15% per year compound interest (in ₹)?
23. 23.Find the compound interest on ₹39600 at 25% per year for 2 years, compounded every year (in ₹).
24. 24.A town has 44000 people. The population grows by 15% every year. What will the population be after 2 years?
25. 25.What is the difference between the compound interest and the simple interest on ₹59600 at 15% per year for 2 years (in ₹)?
26. 26.Find the compound interest on ₹19200 at 5% per year for 2 years, compounded every year (in ₹).
27. 27.What amount will ₹41000 grow to in 2 years at 10% per year compound interest (in ₹)?
28. 28.What amount will ₹38400 grow to in 2 years at 15% per year compound interest (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹56800 at 5% per year for 2 years (in ₹)?
30. 30.What amount will ₹31000 grow to in 3 years at 10% per year compound interest (in ₹)?
31. 31.A town has 12500 people. The population grows by 25% every year. What will the population be after 1 year?
32. 32.What is the difference between the compound interest and the simple interest on ₹20100 at 20% per year for 2 years (in ₹)?
33. 33.Find the compound interest on ₹14900 at 25% per year for 1 year, compounded every year (in ₹).
34. 34.Find the compound interest on ₹48800 at 25% per year for 1 year, compounded every year (in ₹).
35. 35.A town has 32000 people. The population grows by 5% every year. What will the population be after 3 years?
36. 36.Find the compound interest on ₹46500 at 10% per year for 1 year, compounded every year (in ₹).
37. 37.A town has 15000 people. The population grows by 4% every year. What will the population be after 2 years?
38. 38.A town has 17600 people. The population grows by 25% every year. What will the population be after 3 years?
39. 39.A scooter is worth ₹21200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
40. 40.A scooter is worth ₹34300. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?

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