Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 65 · 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 48000 people. The population grows by 5% every year. What will the population be after 3 years?
2. 2.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
3. 3.Find the compound interest on ₹2200 at 10% per year for 1 year, compounded every year (in ₹).
4. 4.What amount will ₹30400 grow to in 3 years at 25% per year compound interest (in ₹)?
5. 5.What amount will ₹15600 grow to in 2 years at 15% per year compound interest (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹32500 at 8% per year for 2 years (in ₹)?
7. 7.Find the compound interest on ₹38600 at 25% per year for 1 year, compounded every year (in ₹).
8. 8.What amount will ₹45000 grow to in 2 years at 4% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹57000 at 5% per year for 1 year, compounded every year (in ₹).
10. 10.What amount will ₹28000 grow to in 1 year at 8% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹17500 at 4% per year for 2 years (in ₹)?
12. 12.Find the compound interest on ₹5600 at 5% per year for 2 years, compounded every year (in ₹).
13. 13.What is the difference between the compound interest and the simple interest on ₹14400 at 10% per year for 2 years (in ₹)?
14. 14.A town has 41300 people. The population grows by 20% every year. What will the population be after 1 year?
15. 15.A scooter is worth ₹56000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
16. 16.A town has 52700 people. The population grows by 15% every year. What will the population be after 1 year?
17. 17.What is the difference between the compound interest and the simple interest on ₹56400 at 25% per year for 2 years (in ₹)?
18. 18.What amount will ₹12800 grow to in 1 year at 15% per year compound interest (in ₹)?
19. 19.Find the compound interest on ₹48400 at 15% per year for 2 years, compounded every year (in ₹).
20. 20.What amount will ₹4300 grow to in 1 year at 20% per year compound interest (in ₹)?
21. 21.Find the compound interest on ₹37900 at 15% per year for 1 year, compounded every year (in ₹).
22. 22.What is the difference between the compound interest and the simple interest on ₹14600 at 20% per year for 2 years (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹36400 at 25% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹2500 at 8% per year for 2 years, compounded every year (in ₹).
25. 25.Find the compound interest on ₹31200 at 8% per year for 1 year, compounded every year (in ₹).
26. 26.Find the compound interest on ₹41300 at 10% per year for 2 years, compounded every year (in ₹).
27. 27.What is the difference between the compound interest and the simple interest on ₹10000 at 10% per year for 2 years (in ₹)?
28. 28.What is the difference between the compound interest and the simple interest on ₹26300 at 20% per year for 2 years (in ₹)?
29. 29.A scooter is worth ₹7700. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
30. 30.A scooter is worth ₹25000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
31. 31.A town has 23000 people. The population grows by 10% every year. What will the population be after 2 years?
32. 32.What amount will ₹51000 grow to in 3 years at 10% per year compound interest (in ₹)?
33. 33.A town has 25800 people. The population grows by 20% every year. What will the population be after 1 year?
34. 34.What amount will ₹34700 grow to in 2 years at 10% per year compound interest (in ₹)?
35. 35.A scooter is worth ₹7400. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
36. 36.Find the compound interest on ₹12500 at 4% per year for 2 years, compounded every year (in ₹).
37. 37.What is the difference between the compound interest and the simple interest on ₹57200 at 5% per year for 2 years (in ₹)?
38. 38.Find the compound interest on ₹26100 at 8% per year for 1 year, compounded every year (in ₹).
39. 39.What amount will ₹22000 grow to in 1 year at 25% per year compound interest (in ₹)?
40. 40.Find the compound interest on ₹58400 at 5% per year for 2 years, compounded every year (in ₹).

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