Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 493 · 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 ₹40000 at 12% per year for 2 years, compounded every year (in ₹).
2. 2.Find the compound interest on ₹40000 at 25% per year for 3 years, compounded every year (in ₹).
3. 3.Find the compound interest on ₹42400 at 25% per year for 2 years, compounded every year (in ₹).
4. 4.What amount will ₹5000 grow to in 3 years at 10% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹48000 at 15% per year for 3 years, compounded every year (in ₹).
6. 6.What amount will ₹26500 grow to in 1 year at 12% per year compound interest (in ₹)?
7. 7.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹31800 at 5% per year for 1 year, compounded every year (in ₹).
9. 9.A town has 24000 people. The population grows by 5% every year. What will the population be after 3 years?
10. 10.Find the compound interest on ₹18800 at 15% per year for 2 years, compounded every year (in ₹).
11. 11.Find the compound interest on ₹16300 at 20% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹56800 at 20% per year for 1 year, compounded every year (in ₹).
13. 13.What is the difference between the compound interest and the simple interest on ₹50000 at 4% per year for 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹34000 at 5% per year for 2 years (in ₹)?
15. 15.What amount will ₹27500 grow to in 2 years at 4% per year compound interest (in ₹)?
16. 16.What amount will ₹11000 grow to in 3 years at 10% per year compound interest (in ₹)?
17. 17.Find the compound interest on ₹46000 at 20% per year for 3 years, compounded every year (in ₹).
18. 18.A scooter is worth ₹3100. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
19. 19.Find the compound interest on ₹32700 at 10% per year for 2 years, compounded every year (in ₹).
20. 20.A town has 3500 people. The population grows by 5% every year. What will the population be after 1 year?
21. 21.A town has 22000 people. The population grows by 20% every year. What will the population be after 3 years?
22. 22.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
23. 23.What amount will ₹56400 grow to in 1 year at 20% per year compound interest (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹10800 at 25% per year for 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹9600 at 15% per year for 2 years (in ₹)?
26. 26.Find the compound interest on ₹52500 at 8% per year for 2 years, compounded every year (in ₹).
27. 27.A scooter is worth ₹44200. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
28. 28.What amount will ₹57600 grow to in 1 year at 15% per year compound interest (in ₹)?
29. 29.A town has 38500 people. The population grows by 20% every year. What will the population be after 3 years?
30. 30.What amount will ₹41700 grow to in 1 year at 5% per year compound interest (in ₹)?
31. 31.What amount will ₹16400 grow to in 1 year at 5% per year compound interest (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹46500 at 20% per year for 2 years (in ₹)?
33. 33.A town has 28500 people. The population grows by 20% every year. What will the population be after 3 years?
34. 34.What is the difference between the compound interest and the simple interest on ₹3500 at 10% per year for 2 years (in ₹)?
35. 35.What amount will ₹5600 grow to in 2 years at 5% per year compound interest (in ₹)?
36. 36.A scooter is worth ₹22200. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹7200 at 5% per year for 2 years (in ₹)?
38. 38.A town has 33600 people. The population grows by 4% every year. What will the population be after 1 year?
39. 39.What amount will ₹35000 grow to in 2 years at 4% per year compound interest (in ₹)?
40. 40.What amount will ₹19200 grow to in 2 years at 15% per year compound interest (in ₹)?

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