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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 837 · 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.

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  1. 1.A scooter is worth ₹51000. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
  2. 2.Find the compound interest on ₹54300 at 20% per year for 2 years, compounded every year (in ₹).
  3. 3.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
  4. 4.What is the difference between the compound interest and the simple interest on ₹12800 at 5% per year for 2 years (in ₹)?
  5. 5.A scooter is worth ₹47400. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
  6. 6.A town has 7500 people. The population grows by 8% every year. What will the population be after 2 years?
  7. 7.What is the difference between the compound interest and the simple interest on ₹58400 at 5% per year for 2 years (in ₹)?
  8. 8.Find the compound interest on ₹34000 at 25% per year for 2 years, compounded every year (in ₹).
  9. 9.Find the compound interest on ₹35000 at 8% per year for 1 year, compounded every year (in ₹).
  10. 10.Find the compound interest on ₹6400 at 25% per year for 3 years, compounded every year (in ₹).
  11. 11.What amount will ₹47100 grow to in 2 years at 10% per year compound interest (in ₹)?
  12. 12.What is the difference between the compound interest and the simple interest on ₹10100 at 10% per year for 2 years (in ₹)?
  13. 13.What is the difference between the compound interest and the simple interest on ₹9300 at 10% per year for 2 years (in ₹)?
  14. 14.Find the compound interest on ₹56000 at 15% per year for 1 year, compounded every year (in ₹).
  15. 15.A scooter is worth ₹29200. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
  16. 16.What amount will ₹11600 grow to in 2 years at 5% per year compound interest (in ₹)?
  17. 17.Find the compound interest on ₹5900 at 10% per year for 1 year, compounded every year (in ₹).
  18. 18.Find the compound interest on ₹39500 at 8% per year for 1 year, compounded every year (in ₹).
  19. 19.A town has 36800 people. The population grows by 25% every year. What will the population be after 3 years?
  20. 20.What is the difference between the compound interest and the simple interest on ₹28500 at 20% per year for 2 years (in ₹)?
  21. 21.What is the difference between the compound interest and the simple interest on ₹19900 at 20% per year for 2 years (in ₹)?
  22. 22.A town has 12600 people. The population grows by 8% every year. What will the population be after 1 year?
  23. 23.What amount will ₹56000 grow to in 3 years at 15% per year compound interest (in ₹)?
  24. 24.What is the difference between the compound interest and the simple interest on ₹37200 at 15% per year for 2 years (in ₹)?
  25. 25.Find the compound interest on ₹44400 at 10% per year for 2 years, compounded every year (in ₹).
  26. 26.What is the difference between the compound interest and the simple interest on ₹22400 at 25% per year for 2 years (in ₹)?
  27. 27.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
  28. 28.Find the compound interest on ₹23000 at 20% per year for 3 years, compounded every year (in ₹).
  29. 29.What is the difference between the compound interest and the simple interest on ₹10000 at 8% per year for 2 years (in ₹)?
  30. 30.What amount will ₹54100 grow to in 2 years at 10% per year compound interest (in ₹)?
  31. 31.A town has 35200 people. The population grows by 25% every year. What will the population be after 3 years?
  32. 32.Find the compound interest on ₹58200 at 5% per year for 1 year, compounded every year (in ₹).
  33. 33.What amount will ₹15600 grow to in 1 year at 25% per year compound interest (in ₹)?
  34. 34.What is the difference between the compound interest and the simple interest on ₹53600 at 5% per year for 2 years (in ₹)?
  35. 35.Find the compound interest on ₹51000 at 20% per year for 3 years, compounded every year (in ₹).
  36. 36.A scooter is worth ₹3500. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
  37. 37.What amount will ₹24000 grow to in 3 years at 20% per year compound interest (in ₹)?
  38. 38.A scooter is worth ₹47200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  39. 39.A scooter is worth ₹24000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
  40. 40.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).

Answer key

  1. 48450
  2. 23892
  3. 44
  4. 32
  5. 42660
  6. 8748
  7. 146
  8. 19125
  9. 2800
  10. 6100
  11. 56991
  12. 101
  13. 93
  14. 8400
  15. 27740
  16. 12789
  17. 590
  18. 3160
  19. 71875
  20. 1140
  21. 796
  22. 13608
  23. 85169
  24. 837
  25. 9324
  26. 1400
  27. 8
  28. 16744
  29. 64
  30. 65461
  31. 68750
  32. 2910
  33. 19500
  34. 134
  35. 37128
  36. 2975
  37. 41472
  38. 42598
  39. 14739
  40. 1261

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