Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 391 · 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.Find the compound interest on ₹5700 at 15% per year for 1 year, compounded every year (in ₹).
2. 2.Find the compound interest on ₹51200 at 10% per year for 2 years, compounded every year (in ₹).
3. 3.Find the compound interest on ₹53100 at 5% per year for 1 year, compounded every year (in ₹).
4. 4.Find the compound interest on ₹50000 at 8% per year for 2 years, compounded every year (in ₹).
5. 5.A town has 15000 people. The population grows by 20% every year. What will the population be after 3 years?
6. 6.What amount will ₹12000 grow to in 3 years at 10% per year compound interest (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹21200 at 25% per year for 2 years (in ₹)?
8. 8.A scooter is worth ₹20000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
9. 9.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹22400 at 5% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹43500 at 20% per year for 1 year, compounded every year (in ₹).
12. 12.What is the difference between the compound interest and the simple interest on ₹11600 at 15% per year for 2 years (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹28400 at 5% per year for 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹54000 at 25% per year for 2 years (in ₹)?
15. 15.A town has 10600 people. The population grows by 5% every year. What will the population be after 1 year?
16. 16.A scooter is worth ₹20000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹13200 at 15% per year for 2 years (in ₹)?
18. 18.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
19. 19.A town has 9800 people. The population grows by 12% every year. What will the population be after 1 year?
20. 20.What amount will ₹30800 grow to in 2 years at 15% per year compound interest (in ₹)?
21. 21.A scooter is worth ₹38900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹16400 at 25% per year for 2 years (in ₹)?
23. 23.A scooter is worth ₹35600. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
24. 24.Find the compound interest on ₹11400 at 20% per year for 2 years, compounded every year (in ₹).
25. 25.A town has 58400 people. The population grows by 25% every year. What will the population be after 1 year?
26. 26.A scooter is worth ₹38700. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
27. 27.A town has 30000 people. The population grows by 10% every year. What will the population be after 1 year?
28. 28.What is the difference between the compound interest and the simple interest on ₹46800 at 15% per year for 2 years (in ₹)?
29. 29.What amount will ₹49500 grow to in 1 year at 15% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹29900. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
31. 31.What is the difference between the compound interest and the simple interest on ₹57500 at 4% per year for 2 years (in ₹)?
32. 32.Find the compound interest on ₹8800 at 5% per year for 1 year, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹30000 at 4% per year for 2 years (in ₹)?
34. 34.A town has 32000 people. The population grows by 20% every year. What will the population be after 3 years?
35. 35.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
36. 36.Find the compound interest on ₹18000 at 5% per year for 2 years, compounded every year (in ₹).
37. 37.What amount will ₹55000 grow to in 1 year at 12% per year compound interest (in ₹)?
38. 38.Find the compound interest on ₹24500 at 5% per year for 1 year, compounded every year (in ₹).
39. 39.A town has 17500 people. The population grows by 8% every year. What will the population be after 2 years?
40. 40.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?

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