Class 8 Maths Worksheet: Compound Interest
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.
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- 1.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
- 2.Find the compound interest on ₹35400 at 10% per year for 2 years, compounded every year (in ₹).
- 3.What is the difference between the compound interest and the simple interest on ₹43500 at 20% per year for 2 years (in ₹)?
- 4.A scooter is worth ₹15600. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
- 5.Find the compound interest on ₹22500 at 8% per year for 2 years, compounded every year (in ₹).
- 6.What amount will ₹15600 grow to in 1 year at 10% per year compound interest (in ₹)?
- 7.What is the difference between the compound interest and the simple interest on ₹6100 at 20% per year for 2 years (in ₹)?
- 8.Find the compound interest on ₹17000 at 10% per year for 3 years, compounded every year (in ₹).
- 9.What amount will ₹6300 grow to in 1 year at 12% per year compound interest (in ₹)?
- 10.Find the compound interest on ₹23300 at 10% per year for 1 year, compounded every year (in ₹).
- 11.What is the difference between the compound interest and the simple interest on ₹42500 at 12% per year for 2 years (in ₹)?
- 12.What is the difference between the compound interest and the simple interest on ₹15000 at 12% per year for 2 years (in ₹)?
- 13.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
- 14.What is the difference between the compound interest and the simple interest on ₹4000 at 15% per year for 2 years (in ₹)?
- 15.What is the difference between the compound interest and the simple interest on ₹41200 at 25% per year for 2 years (in ₹)?
- 16.What amount will ₹35600 grow to in 2 years at 25% per year compound interest (in ₹)?
- 17.A town has 22400 people. The population grows by 25% every year. What will the population be after 3 years?
- 18.A town has 5000 people. The population grows by 4% every year. What will the population be after 2 years?
- 19.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
- 20.Find the compound interest on ₹10800 at 15% per year for 2 years, compounded every year (in ₹).
- 21.Find the compound interest on ₹35500 at 20% per year for 3 years, compounded every year (in ₹).
- 22.Find the compound interest on ₹32400 at 4% per year for 1 year, compounded every year (in ₹).
- 23.A scooter is worth ₹17300. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
- 24.Find the compound interest on ₹31900 at 8% per year for 1 year, compounded every year (in ₹).
- 25.What amount will ₹43700 grow to in 1 year at 5% per year compound interest (in ₹)?
- 26.What amount will ₹19900 grow to in 2 years at 10% per year compound interest (in ₹)?
- 27.Find the compound interest on ₹59200 at 25% per year for 3 years, compounded every year (in ₹).
- 28.A town has 60000 people. The population grows by 8% every year. What will the population be after 2 years?
- 29.What is the difference between the compound interest and the simple interest on ₹54300 at 10% per year for 2 years (in ₹)?
- 30.What is the difference between the compound interest and the simple interest on ₹28800 at 15% per year for 2 years (in ₹)?
- 31.A scooter is worth ₹40000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
- 32.A scooter is worth ₹30000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
- 33.What amount will ₹11100 grow to in 1 year at 20% per year compound interest (in ₹)?
- 34.What is the difference between the compound interest and the simple interest on ₹52500 at 4% per year for 2 years (in ₹)?
- 35.What is the difference between the compound interest and the simple interest on ₹22500 at 12% per year for 2 years (in ₹)?
- 36.Find the compound interest on ₹33400 at 15% per year for 1 year, compounded every year (in ₹).
- 37.What is the difference between the compound interest and the simple interest on ₹33700 at 10% per year for 2 years (in ₹)?
- 38.What is the difference between the compound interest and the simple interest on ₹30000 at 4% per year for 2 years (in ₹)?
- 39.What amount will ₹22500 grow to in 2 years at 8% per year compound interest (in ₹)?
- 40.A scooter is worth ₹54000. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
Answer key
- 368
- 7434
- 1740
- 9984
- 3744
- 17160
- 244
- 5627
- 7056
- 2330
- 612
- 216
- 2522
- 90
- 2575
- 55625
- 43750
- 5408
- 29169
- 3483
- 25844
- 1296
- 16608
- 2552
- 45885
- 24079
- 56425
- 69984
- 543
- 648
- 34295
- 27648
- 13320
- 84
- 324
- 5010
- 337
- 48
- 26244
- 40500
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