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Class 7 Maths — Simple interest

Work out simple interest and the total amount, and find the rate or the time when the interest is known.

Name: ________________________

  1. 1.The simple interest on ₹2500 for 4 years is ₹500. What is the rate per cent per year? Give just the number.

  2. 2.Find the simple interest on ₹1200 at 10% per year for 1 year. Give just the number.

  3. 3.The principal and the rate stay the same, but the money is left for twice as long. What happens to the simple interest?

    • a) It halves
    • b) It doubles
    • c) It is multiplied by itself
    • d) It stays the same

  4. 4.₹4000 is borrowed at 6% per year for 3 years. What is the total amount to be paid back? Give just the number.

  5. 5.In every row the principal is ₹1000 and the rate is 10% per year. Match each length of time to the simple interest it earns.

    • 1 year
    • 2 years
    • 3 years
    • 5 years
    • 500
    • 100
    • 300
    • 200

  6. 6.Each of these is left for 2 years. Sort them by whether the simple interest comes to less or more than ₹500.

    Groups: Less than ₹500 · More than ₹500

    • ₹5000 at 6% per year
    • ₹5000 at 8% per year
    • ₹4000 at 8% per year
    • ₹2000 at 10% per year
    • ₹1000 at 20% per year
    • ₹3000 at 5% per year

  7. 7.Find the simple interest on ₹5000 at 8% per year for 2 years. Give just the number.

  8. 8.Find the simple interest on ₹3000 at 7% per year for 6 months. Give just the number.

Answer key — Class 7 Maths — Simple interest

  1. 1. 5
  2. 2. 120
  3. 3. b) It doubles
  4. 4. 4720
  5. 5. 1 year → 100; 2 years → 200; 3 years → 300; 5 years → 500
  6. 6. ₹2000 at 10% per year → Less than ₹500; ₹5000 at 6% per year → More than ₹500; ₹1000 at 20% per year → Less than ₹500; ₹4000 at 8% per year → More than ₹500; ₹3000 at 5% per year → Less than ₹500; ₹5000 at 8% per year → More than ₹500
  7. 7. 800
  8. 8. 105