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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 956 · 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 ₹58400 at 15% per year for 2 years (in ₹)?
  2. 2.Find the compound interest on ₹6500 at 15% per year for 1 year, compounded every year (in ₹).
  3. 3.What amount will ₹30000 grow to in 3 years at 20% per year compound interest (in ₹)?
  4. 4.A town has 46300 people. The population grows by 4% every year. What will the population be after 1 year?
  5. 5.What is the difference between the compound interest and the simple interest on ₹20400 at 25% per year for 2 years (in ₹)?
  6. 6.What is the difference between the compound interest and the simple interest on ₹42500 at 8% per year for 2 years (in ₹)?
  7. 7.Find the compound interest on ₹22000 at 25% per year for 2 years, compounded every year (in ₹).
  8. 8.Find the compound interest on ₹8200 at 15% per year for 1 year, compounded every year (in ₹).
  9. 9.What amount will ₹14400 grow to in 3 years at 25% per year compound interest (in ₹)?
  10. 10.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
  11. 11.Find the compound interest on ₹53600 at 10% per year for 2 years, compounded every year (in ₹).
  12. 12.What is the difference between the compound interest and the simple interest on ₹59200 at 15% per year for 2 years (in ₹)?
  13. 13.What amount will ₹19300 grow to in 1 year at 8% per year compound interest (in ₹)?
  14. 14.What amount will ₹17500 grow to in 2 years at 8% per year compound interest (in ₹)?
  15. 15.What is the difference between the compound interest and the simple interest on ₹5600 at 25% per year for 2 years (in ₹)?
  16. 16.Find the compound interest on ₹33600 at 25% per year for 3 years, compounded every year (in ₹).
  17. 17.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
  18. 18.Find the compound interest on ₹22500 at 12% per year for 2 years, compounded every year (in ₹).
  19. 19.Find the compound interest on ₹22100 at 10% per year for 1 year, compounded every year (in ₹).
  20. 20.A town has 2500 people. The population grows by 8% every year. What will the population be after 2 years?
  21. 21.A town has 48000 people. The population grows by 15% every year. What will the population be after 3 years?
  22. 22.A scooter is worth ₹44000. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
  23. 23.What is the difference between the compound interest and the simple interest on ₹52500 at 4% per year for 2 years (in ₹)?
  24. 24.A scooter is worth ₹15200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  25. 25.A town has 20000 people. The population grows by 4% every year. What will the population be after 2 years?
  26. 26.What amount will ₹5000 grow to in 3 years at 20% per year compound interest (in ₹)?
  27. 27.What is the difference between the compound interest and the simple interest on ₹57500 at 12% per year for 2 years (in ₹)?
  28. 28.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
  29. 29.A scooter is worth ₹55000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
  30. 30.Find the compound interest on ₹48800 at 5% per year for 2 years, compounded every year (in ₹).
  31. 31.A scooter is worth ₹39100. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
  32. 32.Find the compound interest on ₹46000 at 20% per year for 3 years, compounded every year (in ₹).
  33. 33.Find the compound interest on ₹41600 at 25% per year for 2 years, compounded every year (in ₹).
  34. 34.What is the difference between the compound interest and the simple interest on ₹5000 at 8% 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.What amount will ₹58400 grow to in 2 years at 10% per year compound interest (in ₹)?
  37. 37.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
  38. 38.A scooter is worth ₹60000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
  39. 39.What amount will ₹8000 grow to in 3 years at 20% per year compound interest (in ₹)?
  40. 40.Find the compound interest on ₹42900 at 8% per year for 1 year, compounded every year (in ₹).

Answer key

  1. 1314
  2. 975
  3. 51840
  4. 48152
  5. 1275
  6. 272
  7. 12375
  8. 1230
  9. 28125
  10. 108
  11. 11256
  12. 1332
  13. 20844
  14. 20412
  15. 350
  16. 32025
  17. 48668
  18. 5724
  19. 2210
  20. 2916
  21. 73002
  22. 24750
  23. 84
  24. 13718
  25. 21632
  26. 8640
  27. 828
  28. 8
  29. 28160
  30. 5002
  31. 25024
  32. 33488
  33. 23400
  34. 32
  35. 324
  36. 70664
  37. 6305
  38. 46464
  39. 13824
  40. 3432

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