Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 9 · 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.What is the difference between the compound interest and the simple interest on ₹46200 at 20% per year for 2 years (in ₹)?
2. 2.A scooter is worth ₹9900. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
3. 3.What amount will ₹58800 grow to in 2 years at 20% per year compound interest (in ₹)?
4. 4.A town has 12800 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 ₹32400 at 25% per year for 2 years (in ₹)?
6. 6.Find the compound interest on ₹58400 at 5% per year for 1 year, compounded every year (in ₹).
7. 7.Find the compound interest on ₹44000 at 10% per year for 3 years, compounded every year (in ₹).
8. 8.A scooter is worth ₹5000. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
9. 9.What is the difference between the compound interest and the simple interest on ₹31200 at 25% per year for 2 years (in ₹)?
10. 10.What amount will ₹2500 grow to in 2 years at 4% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹26400 at 25% per year for 2 years, compounded every year (in ₹).
12. 12.What is the difference between the compound interest and the simple interest on ₹45200 at 5% per year for 2 years (in ₹)?
13. 13.A scooter is worth ₹14000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
14. 14.What amount will ₹2000 grow to in 3 years at 10% per year compound interest (in ₹)?
15. 15.What amount will ₹24000 grow to in 3 years at 5% per year compound interest (in ₹)?
16. 16.A scooter is worth ₹30800. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
17. 17.A scooter is worth ₹48000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹18800 at 25% per year for 2 years (in ₹)?
19. 19.A town has 26600 people. The population grows by 10% every year. What will the population be after 1 year?
20. 20.Find the compound interest on ₹35900 at 12% per year for 1 year, compounded every year (in ₹).
21. 21.What amount will ₹52100 grow to in 1 year at 8% per year compound interest (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹59200 at 20% per year for 2 years (in ₹)?
23. 23.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹47500 at 8% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹47500 at 12% per year for 1 year, compounded every year (in ₹).
26. 26.A town has 24000 people. The population grows by 5% every year. What will the population be after 3 years?
27. 27.Find the compound interest on ₹30400 at 5% per year for 2 years, compounded every year (in ₹).
28. 28.A town has 5500 people. The population grows by 20% every year. What will the population be after 3 years?
29. 29.A town has 27800 people. The population grows by 10% every year. What will the population be after 1 year?
30. 30.Find the compound interest on ₹55200 at 8% per year for 1 year, compounded every year (in ₹).
31. 31.A scooter is worth ₹38000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
32. 32.What amount will ₹50800 grow to in 1 year at 4% per year compound interest (in ₹)?
33. 33.Find the compound interest on ₹2900 at 10% per year for 1 year, compounded every year (in ₹).
34. 34.What amount will ₹10100 grow to in 1 year at 8% per year compound interest (in ₹)?
35. 35.A scooter is worth ₹55200. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
36. 36.Find the compound interest on ₹28100 at 12% per year for 1 year, compounded every year (in ₹).
37. 37.What is the difference between the compound interest and the simple interest on ₹17200 at 25% per year for 2 years (in ₹)?
38. 38.Find the compound interest on ₹16900 at 4% per year for 1 year, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹6800 at 20% per year for 2 years (in ₹)?
40. 40.A town has 5300 people. The population grows by 20% every year. What will the population be after 1 year?

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