Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 545 · 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 50700 people. The population grows by 20% every year. What will the population be after 2 years?
2. 2.A scooter is worth ₹27400. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
3. 3.Find the compound interest on ₹1600 at 25% per year for 3 years, compounded every year (in ₹).
4. 4.What amount will ₹4500 grow to in 3 years at 20% per year compound interest (in ₹)?
5. 5.A town has 44400 people. The population grows by 25% every year. What will the population be after 2 years?
6. 6.What is the difference between the compound interest and the simple interest on ₹15000 at 10% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹27100 at 20% per year for 2 years (in ₹)?
8. 8.A scooter is worth ₹25600. Its value falls by 4% 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 ₹60000 at 8% per year for 2 years (in ₹)?
10. 10.Find the compound interest on ₹37500 at 10% per year for 2 years, compounded every year (in ₹).
11. 11.What amount will ₹3100 grow to in 1 year at 15% per year compound interest (in ₹)?
12. 12.What amount will ₹16000 grow to in 2 years at 15% per year compound interest (in ₹)?
13. 13.A town has 3200 people. The population grows by 25% every year. What will the population be after 3 years?
14. 14.What amount will ₹32800 grow to in 1 year at 25% per year compound interest (in ₹)?
15. 15.Find the compound interest on ₹9600 at 25% per year for 3 years, compounded every year (in ₹).
16. 16.What amount will ₹35000 grow to in 2 years at 4% per year compound interest (in ₹)?
17. 17.Find the compound interest on ₹37500 at 12% per year for 2 years, compounded every year (in ₹).
18. 18.Find the compound interest on ₹24600 at 5% per year for 1 year, compounded every year (in ₹).
19. 19.Find the compound interest on ₹23600 at 25% per year for 1 year, compounded every year (in ₹).
20. 20.A scooter is worth ₹21200. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
21. 21.A town has 45700 people. The population grows by 10% every year. What will the population be after 1 year?
22. 22.A town has 32400 people. The population grows by 10% every year. What will the population be after 1 year?
23. 23.Find the compound interest on ₹42300 at 5% per year for 1 year, compounded every year (in ₹).
24. 24.A town has 14300 people. The population grows by 5% every year. What will the population be after 1 year?
25. 25.Find the compound interest on ₹57500 at 8% per year for 2 years, compounded every year (in ₹).
26. 26.Find the compound interest on ₹3100 at 20% per year for 2 years, compounded every year (in ₹).
27. 27.A town has 30000 people. The population grows by 8% every year. What will the population be after 2 years?
28. 28.A town has 40000 people. The population grows by 4% every year. What will the population be after 2 years?
29. 29.A scooter is worth ₹53300. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
30. 30.A scooter is worth ₹50000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
31. 31.Find the compound interest on ₹26400 at 5% per year for 1 year, compounded every year (in ₹).
32. 32.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
33. 33.What amount will ₹28500 grow to in 1 year at 25% per year compound interest (in ₹)?
34. 34.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
35. 35.What amount will ₹50800 grow to in 2 years at 5% per year compound interest (in ₹)?
36. 36.What amount will ₹44500 grow to in 3 years at 20% per year compound interest (in ₹)?
37. 37.A scooter is worth ₹35200. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
38. 38.A scooter is worth ₹33000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
39. 39.A town has 23600 people. The population grows by 25% every year. What will the population be after 2 years?
40. 40.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?

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