Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 722 · 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 16000 people. The population grows by 15% every year. What will the population be after 3 years?
2. 2.A town has 15700 people. The population grows by 4% every year. What will the population be after 1 year?
3. 3.What is the difference between the compound interest and the simple interest on ₹17500 at 12% per year for 2 years (in ₹)?
4. 4.Find the compound interest on ₹30000 at 5% per year for 2 years, compounded every year (in ₹).
5. 5.What is the difference between the compound interest and the simple interest on ₹35100 at 20% per year for 2 years (in ₹)?
6. 6.What amount will ₹35200 grow to in 1 year at 12% per year compound interest (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹40800 at 20% per year for 2 years (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹10800 at 25% per year for 2 years (in ₹)?
9. 9.A town has 55000 people. The population grows by 4% every year. What will the population be after 2 years?
10. 10.Find the compound interest on ₹54900 at 12% per year for 1 year, compounded every year (in ₹).
11. 11.What amount will ₹16400 grow to in 2 years at 25% per year compound interest (in ₹)?
12. 12.What amount will ₹17300 grow to in 1 year at 10% per year compound interest (in ₹)?
13. 13.What amount will ₹49800 grow to in 1 year at 5% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹4500 at 10% per year for 1 year, compounded every year (in ₹).
15. 15.A scooter is worth ₹32000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹4800 at 25% per year for 2 years (in ₹)?
17. 17.A scooter is worth ₹38600. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
18. 18.A town has 5000 people. The population grows by 4% every year. What will the population be after 2 years?
19. 19.Find the compound interest on ₹12500 at 8% per year for 2 years, compounded every year (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.Find the compound interest on ₹55000 at 8% per year for 2 years, compounded every year (in ₹).
22. 22.Find the compound interest on ₹42500 at 12% per year for 2 years, compounded every year (in ₹).
23. 23.What amount will ₹36700 grow to in 1 year at 12% per year compound interest (in ₹)?
24. 24.A scooter is worth ₹41600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹55000 at 12% per year for 2 years (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹24000 at 15% per year for 2 years (in ₹)?
27. 27.A scooter is worth ₹40000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
28. 28.A scooter is worth ₹8700. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
29. 29.What amount will ₹50200 grow to in 1 year at 4% per year compound interest (in ₹)?
30. 30.What amount will ₹52800 grow to in 1 year at 10% per year compound interest (in ₹)?
31. 31.What amount will ₹5700 grow to in 1 year at 25% per year compound interest (in ₹)?
32. 32.Find the compound interest on ₹18500 at 20% per year for 3 years, compounded every year (in ₹).
33. 33.A scooter is worth ₹28800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
34. 34.A town has 21300 people. The population grows by 4% every year. What will the population be after 1 year?
35. 35.Find the compound interest on ₹19700 at 5% per year for 1 year, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹35000 at 12% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹47000 at 8% per year for 1 year, compounded every year (in ₹).
38. 38.What amount will ₹54700 grow to in 1 year at 15% per year compound interest (in ₹)?
39. 39.A scooter is worth ₹10200. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹27600 at 5% per year for 2 years (in ₹)?

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