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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 304 · 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.Find the compound interest on ₹24800 at 5% per year for 2 years, compounded every year (in ₹).
  2. 2.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
  3. 3.What is the difference between the compound interest and the simple interest on ₹30000 at 8% per year for 2 years (in ₹)?
  4. 4.A town has 44800 people. The population grows by 25% every year. What will the population be after 3 years?
  5. 5.A town has 28700 people. The population grows by 8% every year. What will the population be after 1 year?
  6. 6.Find the compound interest on ₹10000 at 4% per year for 2 years, compounded every year (in ₹).
  7. 7.A town has 9900 people. The population grows by 5% every year. What will the population be after 1 year?
  8. 8.Find the compound interest on ₹16700 at 10% per year for 2 years, compounded every year (in ₹).
  9. 9.Find the compound interest on ₹5700 at 4% per year for 1 year, compounded every year (in ₹).
  10. 10.A scooter is worth ₹20000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
  11. 11.What is the difference between the compound interest and the simple interest on ₹2900 at 10% per year for 2 years (in ₹)?
  12. 12.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
  13. 13.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?
  14. 14.Find the compound interest on ₹4800 at 25% per year for 1 year, compounded every year (in ₹).
  15. 15.What amount will ₹27500 grow to in 2 years at 4% per year compound interest (in ₹)?
  16. 16.Find the compound interest on ₹59200 at 25% per year for 3 years, compounded every year (in ₹).
  17. 17.A scooter is worth ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
  18. 18.What is the difference between the compound interest and the simple interest on ₹30000 at 12% per year for 2 years (in ₹)?
  19. 19.A town has 40900 people. The population grows by 5% every year. What will the population be after 1 year?
  20. 20.Find the compound interest on ₹2400 at 15% per year for 2 years, compounded every year (in ₹).
  21. 21.What amount will ₹45600 grow to in 1 year at 4% per year compound interest (in ₹)?
  22. 22.What amount will ₹42600 grow to in 1 year at 10% per year compound interest (in ₹)?
  23. 23.Find the compound interest on ₹54000 at 20% per year for 3 years, compounded every year (in ₹).
  24. 24.What is the difference between the compound interest and the simple interest on ₹54800 at 25% per year for 2 years (in ₹)?
  25. 25.Find the compound interest on ₹30000 at 12% per year for 2 years, compounded every year (in ₹).
  26. 26.Find the compound interest on ₹52800 at 15% per year for 2 years, compounded every year (in ₹).
  27. 27.What amount will ₹50700 grow to in 1 year at 5% per year compound interest (in ₹)?
  28. 28.What amount will ₹56800 grow to in 1 year at 25% per year compound interest (in ₹)?
  29. 29.A scooter is worth ₹9900. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
  30. 30.What amount will ₹8000 grow to in 3 years at 25% per year compound interest (in ₹)?
  31. 31.Find the compound interest on ₹15800 at 8% per year for 1 year, compounded every year (in ₹).
  32. 32.What amount will ₹38900 grow to in 2 years at 20% per year compound interest (in ₹)?
  33. 33.What is the difference between the compound interest and the simple interest on ₹10500 at 10% per year for 2 years (in ₹)?
  34. 34.What is the difference between the compound interest and the simple interest on ₹50000 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 8% per year for 2 years (in ₹)?
  36. 36.What amount will ₹22600 grow to in 2 years at 10% per year compound interest (in ₹)?
  37. 37.Find the compound interest on ₹36100 at 12% per year for 1 year, compounded every year (in ₹).
  38. 38.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
  39. 39.A scooter is worth ₹52000. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
  40. 40.Find the compound interest on ₹49600 at 25% per year for 3 years, compounded every year (in ₹).

Answer key

  1. 2542
  2. 112
  3. 192
  4. 87500
  5. 30996
  6. 816
  7. 10395
  8. 3507
  9. 228
  10. 15488
  11. 29
  12. 1261
  13. 4
  14. 1200
  15. 29744
  16. 56425
  17. 13718
  18. 432
  19. 42945
  20. 774
  21. 47424
  22. 46860
  23. 39312
  24. 3425
  25. 7632
  26. 17028
  27. 53235
  28. 71000
  29. 9504
  30. 15625
  31. 1264
  32. 56016
  33. 105
  34. 320
  35. 144
  36. 27346
  37. 4332
  38. 20
  39. 46800
  40. 47275

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