Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 405 · 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 ₹21000 at 5% per year for 1 year, compounded every year (in ₹).
2. 2.Find the compound interest on ₹30800 at 5% per year for 2 years, compounded every year (in ₹).
3. 3.Find the compound interest on ₹29100 at 10% per year for 1 year, compounded every year (in ₹).
4. 4.A town has 33600 people. The population grows by 25% every year. What will the population be after 3 years?
5. 5.What is the difference between the compound interest and the simple interest on ₹38000 at 15% per year for 2 years (in ₹)?
6. 6.Find the compound interest on ₹2500 at 8% per year for 2 years, compounded every year (in ₹).
7. 7.Find the compound interest on ₹20000 at 4% per year for 2 years, compounded every year (in ₹).
8. 8.A town has 2000 people. The population grows by 5% every year. What will the population be after 1 year?
9. 9.A town has 25000 people. The population grows by 8% every year. What will the population be after 2 years?
10. 10.A scooter is worth ₹46200. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
11. 11.A town has 9600 people. The population grows by 15% every year. What will the population be after 2 years?
12. 12.A town has 35000 people. The population grows by 8% every year. What will the population be after 2 years?
13. 13.What is the difference between the compound interest and the simple interest on ₹52800 at 10% per year for 2 years (in ₹)?
14. 14.What amount will ₹41000 grow to in 2 years at 10% per year compound interest (in ₹)?
15. 15.What amount will ₹15700 grow to in 1 year at 20% per year compound interest (in ₹)?
16. 16.Find the compound interest on ₹25300 at 15% per year for 1 year, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹37200 at 5% per year for 2 years (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹25200 at 25% per year for 2 years (in ₹)?
19. 19.What amount will ₹57500 grow to in 2 years at 4% per year compound interest (in ₹)?
20. 20.A town has 16000 people. The population grows by 5% every year. What will the population be after 3 years?
21. 21.What is the difference between the compound interest and the simple interest on ₹35000 at 12% per year for 2 years (in ₹)?
22. 22.What amount will ₹45100 grow to in 1 year at 20% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹60000 at 4% per year for 2 years (in ₹)?
24. 24.What amount will ₹25000 grow to in 2 years at 4% per year compound interest (in ₹)?
25. 25.A town has 21300 people. The population grows by 5% every year. What will the population be after 1 year?
26. 26.What amount will ₹22900 grow to in 1 year at 4% per year compound interest (in ₹)?
27. 27.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
28. 28.What amount will ₹50000 grow to in 1 year at 10% per year compound interest (in ₹)?
29. 29.What amount will ₹19200 grow to in 3 years at 25% per year compound interest (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹47500 at 12% per year for 2 years (in ₹)?
31. 31.What amount will ₹43900 grow to in 1 year at 10% per year compound interest (in ₹)?
32. 32.A town has 33400 people. The population grows by 12% every year. What will the population be after 1 year?
33. 33.A scooter is worth ₹5200. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹25500 at 20% per year for 2 years (in ₹)?
35. 35.What is the difference between the compound interest and the simple interest on ₹5000 at 12% per year for 2 years (in ₹)?
36. 36.Find the compound interest on ₹22500 at 5% per year for 1 year, compounded every year (in ₹).
37. 37.What amount will ₹58400 grow to in 1 year at 4% per year compound interest (in ₹)?
38. 38.Find the compound interest on ₹51400 at 4% per year for 1 year, compounded every year (in ₹).
39. 39.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
40. 40.A scooter is worth ₹21800. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?

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