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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 633 · 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 ₹14800 at 5% per year for 2 years (in ₹)?
  2. 2.A scooter is worth ₹47900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
  3. 3.A scooter is worth ₹38900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
  4. 4.What amount will ₹20000 grow to in 3 years at 20% per year compound interest (in ₹)?
  5. 5.Find the compound interest on ₹12800 at 25% per year for 3 years, compounded every year (in ₹).
  6. 6.Find the compound interest on ₹48000 at 10% per year for 3 years, compounded every year (in ₹).
  7. 7.Find the compound interest on ₹57200 at 20% per year for 2 years, compounded every year (in ₹).
  8. 8.What amount will ₹16300 grow to in 1 year at 8% per year compound interest (in ₹)?
  9. 9.What is the difference between the compound interest and the simple interest on ₹50000 at 4% per year for 2 years (in ₹)?
  10. 10.What amount will ₹37200 grow to in 2 years at 25% per year compound interest (in ₹)?
  11. 11.Find the compound interest on ₹12000 at 10% per year for 1 year, compounded every year (in ₹).
  12. 12.Find the compound interest on ₹38400 at 25% per year for 3 years, compounded every year (in ₹).
  13. 13.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
  14. 14.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
  15. 15.What amount will ₹47500 grow to in 2 years at 8% per year compound interest (in ₹)?
  16. 16.What is the difference between the compound interest and the simple interest on ₹40000 at 15% per year for 2 years (in ₹)?
  17. 17.Find the compound interest on ₹14400 at 5% per year for 1 year, compounded every year (in ₹).
  18. 18.What is the difference between the compound interest and the simple interest on ₹17200 at 15% per year for 2 years (in ₹)?
  19. 19.Find the compound interest on ₹45300 at 15% per year for 1 year, compounded every year (in ₹).
  20. 20.What amount will ₹4400 grow to in 2 years at 10% per year compound interest (in ₹)?
  21. 21.Find the compound interest on ₹20300 at 12% per year for 1 year, compounded every year (in ₹).
  22. 22.What is the difference between the compound interest and the simple interest on ₹22400 at 5% per year for 2 years (in ₹)?
  23. 23.What is the difference between the compound interest and the simple interest on ₹15000 at 8% per year for 2 years (in ₹)?
  24. 24.Find the compound interest on ₹11200 at 25% per year for 3 years, compounded every year (in ₹).
  25. 25.Find the compound interest on ₹27700 at 25% per year for 1 year, compounded every year (in ₹).
  26. 26.What amount will ₹39700 grow to in 1 year at 4% per year compound interest (in ₹)?
  27. 27.Find the compound interest on ₹24500 at 12% per year for 1 year, compounded every year (in ₹).
  28. 28.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
  29. 29.What amount will ₹32800 grow to in 1 year at 12% per year compound interest (in ₹)?
  30. 30.Find the compound interest on ₹14600 at 8% per year for 1 year, compounded every year (in ₹).
  31. 31.What amount will ₹25900 grow to in 1 year at 4% per year compound interest (in ₹)?
  32. 32.A scooter is worth ₹13200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  33. 33.What amount will ₹2500 grow to in 2 years at 12% per year compound interest (in ₹)?
  34. 34.Find the compound interest on ₹17500 at 12% per year for 2 years, compounded every year (in ₹).
  35. 35.What amount will ₹3700 grow to in 1 year at 8% per year compound interest (in ₹)?
  36. 36.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
  37. 37.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
  38. 38.A town has 24000 people. The population grows by 15% every year. What will the population be after 3 years?
  39. 39.Find the compound interest on ₹53000 at 10% per year for 3 years, compounded every year (in ₹).
  40. 40.A town has 2000 people. The population grows by 5% every year. What will the population be after 2 years?

Answer key

  1. 37
  2. 35925
  3. 29175
  4. 34560
  5. 12200
  6. 15888
  7. 25168
  8. 17604
  9. 80
  10. 58125
  11. 1200
  12. 36600
  13. 108
  14. 11448
  15. 55404
  16. 900
  17. 720
  18. 387
  19. 6795
  20. 5324
  21. 2436
  22. 56
  23. 96
  24. 10675
  25. 6925
  26. 41288
  27. 2940
  28. 306
  29. 36736
  30. 1168
  31. 26936
  32. 11913
  33. 3136
  34. 4452
  35. 3996
  36. 20835
  37. 2522
  38. 36501
  39. 17543
  40. 2205

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