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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 560 · 40 sums
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.A scooter is worth ₹60000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
  2. 2.Find the compound interest on ₹11200 at 15% per year for 1 year, compounded every year (in ₹).
  3. 3.Find the compound interest on ₹2800 at 10% per year for 2 years, compounded every year (in ₹).
  4. 4.What amount will ₹18600 grow to in 1 year at 15% per year compound interest (in ₹)?
  5. 5.What amount will ₹57300 grow to in 1 year at 15% per year compound interest (in ₹)?
  6. 6.Find the compound interest on ₹36800 at 12% per year for 1 year, compounded every year (in ₹).
  7. 7.What is the difference between the compound interest and the simple interest on ₹27500 at 12% per year for 2 years (in ₹)?
  8. 8.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
  9. 9.What is the difference between the compound interest and the simple interest on ₹5000 at 12% per year for 2 years (in ₹)?
  10. 10.A scooter is worth ₹32400. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
  11. 11.A town has 21000 people. The population grows by 10% every year. What will the population be after 3 years?
  12. 12.What is the difference between the compound interest and the simple interest on ₹10000 at 4% per year for 2 years (in ₹)?
  13. 13.What amount will ₹27500 grow to in 2 years at 8% per year compound interest (in ₹)?
  14. 14.What amount will ₹25600 grow to in 2 years at 15% per year compound interest (in ₹)?
  15. 15.What is the difference between the compound interest and the simple interest on ₹20000 at 4% per year for 2 years (in ₹)?
  16. 16.What is the difference between the compound interest and the simple interest on ₹52500 at 8% per year for 2 years (in ₹)?
  17. 17.Find the compound interest on ₹36800 at 25% per year for 3 years, compounded every year (in ₹).
  18. 18.What amount will ₹14000 grow to in 1 year at 15% per year compound interest (in ₹)?
  19. 19.What is the difference between the compound interest and the simple interest on ₹41400 at 20% per year for 2 years (in ₹)?
  20. 20.A town has 8100 people. The population grows by 20% every year. What will the population be after 2 years?
  21. 21.A scooter is worth ₹52400. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
  22. 22.Find the compound interest on ₹42000 at 15% per year for 2 years, compounded every year (in ₹).
  23. 23.What amount will ₹19400 grow to in 1 year at 8% per year compound interest (in ₹)?
  24. 24.What is the difference between the compound interest and the simple interest on ₹60000 at 12% per year for 2 years (in ₹)?
  25. 25.What is the difference between the compound interest and the simple interest on ₹58400 at 5% per year for 2 years (in ₹)?
  26. 26.A town has 11000 people. The population grows by 10% every year. What will the population be after 3 years?
  27. 27.Find the compound interest on ₹32000 at 15% per year for 3 years, compounded every year (in ₹).
  28. 28.What amount will ₹58200 grow to in 1 year at 10% per year compound interest (in ₹)?
  29. 29.What amount will ₹36600 grow to in 1 year at 12% per year compound interest (in ₹)?
  30. 30.What amount will ₹26400 grow to in 2 years at 10% per year compound interest (in ₹)?
  31. 31.Find the compound interest on ₹37500 at 8% per year for 2 years, compounded every year (in ₹).
  32. 32.What is the difference between the compound interest and the simple interest on ₹32500 at 4% per year for 2 years (in ₹)?
  33. 33.What amount will ₹60000 grow to in 2 years at 8% per year compound interest (in ₹)?
  34. 34.A town has 47500 people. The population grows by 12% every year. What will the population be after 2 years?
  35. 35.What amount will ₹55100 grow to in 1 year at 15% per year compound interest (in ₹)?
  36. 36.A town has 5200 people. The population grows by 8% every year. What will the population be after 1 year?
  37. 37.What is the difference between the compound interest and the simple interest on ₹44000 at 20% per year for 2 years (in ₹)?
  38. 38.Find the compound interest on ₹27200 at 15% per year for 2 years, compounded every year (in ₹).
  39. 39.Find the compound interest on ₹34000 at 5% per year for 2 years, compounded every year (in ₹).
  40. 40.A scooter is worth ₹6400. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?

Answer key

  1. 55296
  2. 1680
  3. 588
  4. 21390
  5. 65895
  6. 4416
  7. 396
  8. 9261
  9. 72
  10. 27540
  11. 27951
  12. 16
  13. 32076
  14. 33856
  15. 32
  16. 336
  17. 35075
  18. 16100
  19. 1656
  20. 11664
  21. 50304
  22. 13545
  23. 20952
  24. 864
  25. 146
  26. 14641
  27. 16668
  28. 64020
  29. 40992
  30. 31944
  31. 6240
  32. 52
  33. 69984
  34. 59584
  35. 63365
  36. 5616
  37. 1760
  38. 8772
  39. 3485
  40. 5888

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