Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 181 · 40 sums

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.

1. 1.What is the difference between the compound interest and the simple interest on ₹38700 at 10% per year for 2 years (in ₹)?
2. 2.What is the difference between the compound interest and the simple interest on ₹50800 at 25% per year for 2 years (in ₹)?
3. 3.Find the compound interest on ₹33600 at 25% per year for 3 years, compounded every year (in ₹).
4. 4.What amount will ₹34400 grow to in 1 year at 15% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹34000 at 5% per year for 2 years, compounded every year (in ₹).
6. 6.What is the difference between the compound interest and the simple interest on ₹30000 at 12% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹42500 at 4% per year for 2 years (in ₹)?
8. 8.What amount will ₹38800 grow to in 2 years at 5% per year compound interest (in ₹)?
9. 9.What is the difference between the compound interest and the simple interest on ₹24500 at 10% per year for 2 years (in ₹)?
10. 10.Find the compound interest on ₹30500 at 20% per year for 3 years, compounded every year (in ₹).
11. 11.What amount will ₹32300 grow to in 1 year at 10% per year compound interest (in ₹)?
12. 12.Find the compound interest on ₹20000 at 4% per year for 2 years, compounded every year (in ₹).
13. 13.A town has 45800 people. The population grows by 25% every year. What will the population be after 1 year?
14. 14.A town has 28500 people. The population grows by 20% every year. What will the population be after 3 years?
15. 15.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
17. 17.Find the compound interest on ₹40200 at 20% per year for 1 year, compounded every year (in ₹).
18. 18.What amount will ₹44100 grow to in 2 years at 10% per year compound interest (in ₹)?
19. 19.Find the compound interest on ₹41500 at 15% per year for 1 year, compounded every year (in ₹).
20. 20.Find the compound interest on ₹16000 at 15% per year for 3 years, compounded every year (in ₹).
21. 21.What amount will ₹31000 grow to in 1 year at 20% per year compound interest (in ₹)?
22. 22.Find the compound interest on ₹53900 at 12% per year for 1 year, compounded every year (in ₹).
23. 23.What amount will ₹2800 grow to in 2 years at 10% per year compound interest (in ₹)?
24. 24.A town has 31000 people. The population grows by 20% every year. What will the population be after 3 years?
25. 25.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
26. 26.A scooter is worth ₹16400. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
27. 27.A scooter is worth ₹38300. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
28. 28.A town has 17900 people. The population grows by 8% every year. What will the population be after 1 year?
29. 29.What amount will ₹46700 grow to in 1 year at 15% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹25200. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
31. 31.What amount will ₹46000 grow to in 2 years at 5% per year compound interest (in ₹)?
32. 32.A scooter is worth ₹53200. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
33. 33.What amount will ₹52000 grow to in 3 years at 10% per year compound interest (in ₹)?
34. 34.What amount will ₹43800 grow to in 1 year at 20% per year compound interest (in ₹)?
35. 35.What amount will ₹35700 grow to in 1 year at 5% per year compound interest (in ₹)?
36. 36.What amount will ₹50700 grow to in 1 year at 15% per year compound interest (in ₹)?
37. 37.A scooter is worth ₹28000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
38. 38.Find the compound interest on ₹17200 at 25% per year for 2 years, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
40. 40.A scooter is worth ₹36200. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?

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