Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 345 · 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 ₹30000 grow to in 2 years at 12% per year compound interest (in ₹)?
2. 2.A scooter is worth ₹16700. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
3. 3.A town has 49000 people. The population grows by 10% every year. What will the population be after 3 years?
4. 4.What is the difference between the compound interest and the simple interest on ₹20000 at 4% per year for 2 years (in ₹)?
5. 5.A town has 10500 people. The population grows by 20% every year. What will the population be after 2 years?
6. 6.A scooter is worth ₹40000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
7. 7.Find the compound interest on ₹37700 at 15% per year for 1 year, compounded every year (in ₹).
8. 8.A town has 28400 people. The population grows by 12% every year. What will the population be after 1 year?
9. 9.Find the compound interest on ₹9600 at 20% per year for 2 years, compounded every year (in ₹).
10. 10.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
12. 12.Find the compound interest on ₹37500 at 8% per year for 2 years, compounded every year (in ₹).
13. 13.What is the difference between the compound interest and the simple interest on ₹47200 at 15% per year for 2 years (in ₹)?
14. 14.Find the compound interest on ₹26000 at 5% per year for 2 years, compounded every year (in ₹).
15. 15.Find the compound interest on ₹25600 at 25% per year for 3 years, compounded every year (in ₹).
16. 16.What amount will ₹60000 grow to in 3 years at 20% per year compound interest (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹60000 at 12% per year for 2 years (in ₹)?
18. 18.A town has 8000 people. The population grows by 5% every year. What will the population be after 3 years?
19. 19.A town has 8000 people. The population grows by 15% every year. What will the population be after 3 years?
20. 20.Find the compound interest on ₹37500 at 4% per year for 2 years, compounded every year (in ₹).
21. 21.A scooter is worth ₹26700. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
22. 22.A scooter is worth ₹12100. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹19600 at 5% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹9000 at 10% per year for 3 years, compounded every year (in ₹).
25. 25.What is the difference between the compound interest and the simple interest on ₹33000 at 20% per year for 2 years (in ₹)?
26. 26.A scooter is worth ₹14000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
27. 27.Find the compound interest on ₹50800 at 5% per year for 2 years, compounded every year (in ₹).
28. 28.What amount will ₹14400 grow to in 2 years at 25% per year compound interest (in ₹)?
29. 29.A town has 46800 people. The population grows by 15% every year. What will the population be after 2 years?
30. 30.What amount will ₹16400 grow to in 2 years at 5% per year compound interest (in ₹)?
31. 31.Find the compound interest on ₹14900 at 20% per year for 2 years, compounded every year (in ₹).
32. 32.A scooter is worth ₹10000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
33. 33.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
34. 34.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
35. 35.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹5200 at 5% per year for 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹4000 at 5% per year for 2 years (in ₹)?
38. 38.What amount will ₹38400 grow to in 1 year at 25% per year compound interest (in ₹)?
39. 39.What amount will ₹19000 grow to in 3 years at 10% per year compound interest (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹17700 at 10% per year for 2 years (in ₹)?

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