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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 802 · 40 sums
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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.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
  2. 2.Find the compound interest on ₹35400 at 10% per year for 2 years, compounded every year (in ₹).
  3. 3.What is the difference between the compound interest and the simple interest on ₹43500 at 20% per year for 2 years (in ₹)?
  4. 4.A scooter is worth ₹15600. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
  5. 5.Find the compound interest on ₹22500 at 8% per year for 2 years, compounded every year (in ₹).
  6. 6.What amount will ₹15600 grow to in 1 year at 10% per year compound interest (in ₹)?
  7. 7.What is the difference between the compound interest and the simple interest on ₹6100 at 20% per year for 2 years (in ₹)?
  8. 8.Find the compound interest on ₹17000 at 10% per year for 3 years, compounded every year (in ₹).
  9. 9.What amount will ₹6300 grow to in 1 year at 12% per year compound interest (in ₹)?
  10. 10.Find the compound interest on ₹23300 at 10% per year for 1 year, compounded every year (in ₹).
  11. 11.What is the difference between the compound interest and the simple interest on ₹42500 at 12% per year for 2 years (in ₹)?
  12. 12.What is the difference between the compound interest and the simple interest on ₹15000 at 12% per year for 2 years (in ₹)?
  13. 13.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
  14. 14.What is the difference between the compound interest and the simple interest on ₹4000 at 15% per year for 2 years (in ₹)?
  15. 15.What is the difference between the compound interest and the simple interest on ₹41200 at 25% per year for 2 years (in ₹)?
  16. 16.What amount will ₹35600 grow to in 2 years at 25% per year compound interest (in ₹)?
  17. 17.A town has 22400 people. The population grows by 25% every year. What will the population be after 3 years?
  18. 18.A town has 5000 people. The population grows by 4% every year. What will the population be after 2 years?
  19. 19.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
  20. 20.Find the compound interest on ₹10800 at 15% per year for 2 years, compounded every year (in ₹).
  21. 21.Find the compound interest on ₹35500 at 20% per year for 3 years, compounded every year (in ₹).
  22. 22.Find the compound interest on ₹32400 at 4% per year for 1 year, compounded every year (in ₹).
  23. 23.A scooter is worth ₹17300. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
  24. 24.Find the compound interest on ₹31900 at 8% per year for 1 year, compounded every year (in ₹).
  25. 25.What amount will ₹43700 grow to in 1 year at 5% per year compound interest (in ₹)?
  26. 26.What amount will ₹19900 grow to in 2 years at 10% per year compound interest (in ₹)?
  27. 27.Find the compound interest on ₹59200 at 25% per year for 3 years, compounded every year (in ₹).
  28. 28.A town has 60000 people. The population grows by 8% every year. What will the population be after 2 years?
  29. 29.What is the difference between the compound interest and the simple interest on ₹54300 at 10% per year for 2 years (in ₹)?
  30. 30.What is the difference between the compound interest and the simple interest on ₹28800 at 15% per year for 2 years (in ₹)?
  31. 31.A scooter is worth ₹40000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
  32. 32.A scooter is worth ₹30000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
  33. 33.What amount will ₹11100 grow to in 1 year at 20% per year compound interest (in ₹)?
  34. 34.What is the difference between the compound interest and the simple interest on ₹52500 at 4% per year for 2 years (in ₹)?
  35. 35.What is the difference between the compound interest and the simple interest on ₹22500 at 12% per year for 2 years (in ₹)?
  36. 36.Find the compound interest on ₹33400 at 15% per year for 1 year, compounded every year (in ₹).
  37. 37.What is the difference between the compound interest and the simple interest on ₹33700 at 10% per year for 2 years (in ₹)?
  38. 38.What is the difference between the compound interest and the simple interest on ₹30000 at 4% per year for 2 years (in ₹)?
  39. 39.What amount will ₹22500 grow to in 2 years at 8% per year compound interest (in ₹)?
  40. 40.A scooter is worth ₹54000. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?

Answer key

  1. 368
  2. 7434
  3. 1740
  4. 9984
  5. 3744
  6. 17160
  7. 244
  8. 5627
  9. 7056
  10. 2330
  11. 612
  12. 216
  13. 2522
  14. 90
  15. 2575
  16. 55625
  17. 43750
  18. 5408
  19. 29169
  20. 3483
  21. 25844
  22. 1296
  23. 16608
  24. 2552
  25. 45885
  26. 24079
  27. 56425
  28. 69984
  29. 543
  30. 648
  31. 34295
  32. 27648
  33. 13320
  34. 84
  35. 324
  36. 5010
  37. 337
  38. 48
  39. 26244
  40. 40500

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