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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 260 · 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 ₹52000 at 10% per year for 3 years, compounded every year (in ₹).
  2. 2.What is the difference between the compound interest and the simple interest on ₹41200 at 25% per year for 2 years (in ₹)?
  3. 3.What is the difference between the compound interest and the simple interest on ₹52100 at 10% per year for 2 years (in ₹)?
  4. 4.What is the difference between the compound interest and the simple interest on ₹2500 at 12% per year for 2 years (in ₹)?
  5. 5.Find the compound interest on ₹22500 at 4% per year for 2 years, compounded every year (in ₹).
  6. 6.Find the compound interest on ₹9600 at 25% per year for 3 years, compounded every year (in ₹).
  7. 7.What is the difference between the compound interest and the simple interest on ₹5000 at 8% per year for 2 years (in ₹)?
  8. 8.A town has 18800 people. The population grows by 15% every year. What will the population be after 2 years?
  9. 9.A scooter is worth ₹12800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
  10. 10.What amount will ₹50500 grow to in 1 year at 10% per year compound interest (in ₹)?
  11. 11.Find the compound interest on ₹51200 at 25% per year for 3 years, compounded every year (in ₹).
  12. 12.What amount will ₹8800 grow to in 2 years at 10% per year compound interest (in ₹)?
  13. 13.What amount will ₹12800 grow to in 3 years at 25% per year compound interest (in ₹)?
  14. 14.What amount will ₹7000 grow to in 1 year at 5% per year compound interest (in ₹)?
  15. 15.A town has 11200 people. The population grows by 25% every year. What will the population be after 3 years?
  16. 16.What amount will ₹56000 grow to in 3 years at 10% per year compound interest (in ₹)?
  17. 17.Find the compound interest on ₹50000 at 10% per year for 3 years, compounded every year (in ₹).
  18. 18.Find the compound interest on ₹2500 at 12% per year for 2 years, compounded every year (in ₹).
  19. 19.A town has 13600 people. The population grows by 10% every year. What will the population be after 2 years?
  20. 20.What amount will ₹29900 grow to in 1 year at 5% per year compound interest (in ₹)?
  21. 21.What is the difference between the compound interest and the simple interest on ₹7500 at 10% per year for 2 years (in ₹)?
  22. 22.A scooter is worth ₹32500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
  23. 23.Find the compound interest on ₹3600 at 10% per year for 1 year, compounded every year (in ₹).
  24. 24.What is the difference between the compound interest and the simple interest on ₹32500 at 8% per year for 2 years (in ₹)?
  25. 25.What amount will ₹24000 grow to in 3 years at 5% per year compound interest (in ₹)?
  26. 26.Find the compound interest on ₹19600 at 20% per year for 1 year, compounded every year (in ₹).
  27. 27.Find the compound interest on ₹6000 at 10% per year for 3 years, compounded every year (in ₹).
  28. 28.A scooter is worth ₹34100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
  29. 29.What amount will ₹6000 grow to in 3 years at 20% per year compound interest (in ₹)?
  30. 30.What amount will ₹35200 grow to in 2 years at 15% per year compound interest (in ₹)?
  31. 31.Find the compound interest on ₹4300 at 10% per year for 1 year, compounded every year (in ₹).
  32. 32.Find the compound interest on ₹50700 at 12% per year for 1 year, compounded every year (in ₹).
  33. 33.What amount will ₹10500 grow to in 2 years at 10% per year compound interest (in ₹)?
  34. 34.What is the difference between the compound interest and the simple interest on ₹10000 at 8% per year for 2 years (in ₹)?
  35. 35.What amount will ₹12000 grow to in 3 years at 10% per year compound interest (in ₹)?
  36. 36.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
  37. 37.A town has 7500 people. The population grows by 12% every year. What will the population be after 2 years?
  38. 38.A scooter is worth ₹12500. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
  39. 39.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
  40. 40.Find the compound interest on ₹11800 at 4% per year for 1 year, compounded every year (in ₹).

Answer key

  1. 17212
  2. 2575
  3. 521
  4. 36
  5. 1836
  6. 9150
  7. 32
  8. 24863
  9. 5400
  10. 55550
  11. 48800
  12. 10648
  13. 25000
  14. 7350
  15. 21875
  16. 74536
  17. 16550
  18. 636
  19. 16456
  20. 31395
  21. 75
  22. 25168
  23. 360
  24. 208
  25. 27783
  26. 3920
  27. 1986
  28. 32395
  29. 10368
  30. 46552
  31. 430
  32. 6084
  33. 12705
  34. 64
  35. 15972
  36. 1272
  37. 9408
  38. 11250
  39. 37044
  40. 472

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