Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 973 · 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 amount will ₹42200 grow to in 1 year at 4% per year compound interest (in ₹)?
2. 2.A scooter is worth ₹54300. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
3. 3.A scooter is worth ₹27500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
4. 4.A town has 47700 people. The population grows by 10% every year. What will the population be after 2 years?
5. 5.What is the difference between the compound interest and the simple interest on ₹35700 at 20% per year for 2 years (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹14000 at 15% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹2500 at 8% per year for 2 years (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹17500 at 4% per year for 2 years (in ₹)?
9. 9.Find the compound interest on ₹40000 at 20% per year for 3 years, compounded every year (in ₹).
10. 10.What amount will ₹25000 grow to in 2 years at 8% per year compound interest (in ₹)?
11. 11.What amount will ₹33100 grow to in 1 year at 12% per year compound interest (in ₹)?
12. 12.Find the compound interest on ₹8000 at 15% per year for 3 years, compounded every year (in ₹).
13. 13.What is the difference between the compound interest and the simple interest on ₹34400 at 15% per year for 2 years (in ₹)?
14. 14.A town has 2400 people. The population grows by 20% every year. What will the population be after 2 years?
15. 15.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
16. 16.What amount will ₹20800 grow to in 2 years at 5% per year compound interest (in ₹)?
17. 17.What amount will ₹53400 grow to in 1 year at 8% per year compound interest (in ₹)?
18. 18.Find the compound interest on ₹20300 at 5% per year for 1 year, compounded every year (in ₹).
19. 19.Find the compound interest on ₹57500 at 12% per year for 1 year, compounded every year (in ₹).
20. 20.What is the difference between the compound interest and the simple interest on ₹46800 at 5% per year for 2 years (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹31600 at 5% per year for 2 years (in ₹)?
22. 22.Find the compound interest on ₹56300 at 20% per year for 1 year, compounded every year (in ₹).
23. 23.Find the compound interest on ₹46000 at 15% per year for 1 year, compounded every year (in ₹).
24. 24.What amount will ₹22900 grow to in 2 years at 20% per year compound interest (in ₹)?
25. 25.A town has 19600 people. The population grows by 5% every year. What will the population be after 1 year?
26. 26.What is the difference between the compound interest and the simple interest on ₹55900 at 20% per year for 2 years (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹50500 at 20% per year for 2 years (in ₹)?
28. 28.Find the compound interest on ₹12700 at 20% per year for 2 years, compounded every year (in ₹).
29. 29.Find the compound interest on ₹5000 at 8% per year for 2 years, compounded every year (in ₹).
30. 30.What is the difference between the compound interest and the simple interest on ₹16800 at 15% per year for 2 years (in ₹)?
31. 31.A scooter is worth ₹40000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
32. 32.Find the compound interest on ₹13300 at 10% per year for 1 year, compounded every year (in ₹).
33. 33.A town has 18900 people. The population grows by 5% every year. What will the population be after 1 year?
34. 34.A town has 13600 people. The population grows by 5% every year. What will the population be after 2 years?
35. 35.A scooter is worth ₹28900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹46000 at 25% per year for 2 years (in ₹)?
37. 37.A scooter is worth ₹54200. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
38. 38.What amount will ₹50400 grow to in 2 years at 15% per year compound interest (in ₹)?
39. 39.A scooter is worth ₹15300. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
40. 40.What amount will ₹11800 grow to in 1 year at 10% per year compound interest (in ₹)?

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