Lesson T3.3.2

T3.3.2 Simple interest Quiz: KS3 Maths, Unit 3

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson T3.3.2, Simple interest: 20 multiple choice questions for the KS3 Maths (National Curriculum), Unit 3: Ratio, proportion and rates of change, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. Simple interest: £500 is invested at 4% per year for 3 years. How much interest is earned?

    • £20
    • £60
    • £540
    • £120

  2. £500 is invested at 4% simple interest for 3 years. What is the total amount at the end?

    • £540
    • £560
    • £580
    • £60

  3. What is the simple interest on £1200 at 2.5% per year for 2 years?

    • £60
    • £30
    • £15
    • £120

  4. £800 earns £40 simple interest in 1 year. What is the interest rate?

    • 5%
    • 50%
    • 4%
    • 0.5%

  5. £300 earns £75 simple interest at 5% per year. For how many years was it invested?

    • 5 years
    • 2.5 years
    • 4 years
    • 15 years

  6. After 3 years at 5% simple interest, an amount is £690. What was the original amount?

    • £550
    • £540
    • £600
    • £650

  7. What is the simple interest on £250 at 8% per year for 6 months?

    • £20
    • £10
    • £5
    • £40

  8. In simple interest, interest is calculated on which amount each year?

    • The amount doubled each year
    • The original amount only
    • The total including previous interest
    • Only the interest from the last year

  9. Which formula gives simple interest I, where P is the principal, R is the percentage rate and T is the number of years?

    • I = P + R + T
    • I = P × R × T ÷ 100
    • I = P × R ÷ T
    • I = P × (1 + R)T

  10. Anna invests £2000 at 3% simple interest for 4 years. How much interest does she earn?

    • £240
    • £120
    • £600
    • £60

  11. £1000 is invested at 6% simple interest per year. What is the total after 2 years?

    • £1180
    • £1600
    • £1060
    • £1120

  12. What is the simple interest on £500 at 4% per year for 18 months?

    • £60
    • £30
    • £20
    • £15

  13. What is the simple interest on £1000 at 3% per year for 5 years?

    • £30
    • £300
    • £150
    • £50

  14. £400 is invested at 5% simple interest per year. How much interest is earned in 4 years?

    • £400
    • £20
    • £80
    • £100

  15. What rate of simple interest makes £200 earn £50 interest over 5 years?

    • 10%
    • 5%
    • 2.5%
    • 25%

  16. A sum of money earns £45 simple interest at 3% per year over 3 years. What was the original sum?

    • £450
    • £500
    • £150
    • £1500

  17. A loan of £900 is taken out at 10% simple interest for 2 years. What is the total to repay?

    • £990
    • £180
    • £1170
    • £1080

  18. A savings account pays 1.5% simple interest per year. £2000 is saved for 2 years. What is the total at the end?

    • £2060
    • £2600
    • £2030
    • £2120

  19. How many years does £100 take to earn £24 simple interest at 6% per year?

    • 6 years
    • 24 years
    • 4 years
    • 2.4 years

  20. Which is better: 4% simple interest for 5 years on £400, or 5% simple interest for 3 years on £400?

    • They pay the same interest
    • 4% for 5 years, with £80 interest
    • 5% for 3 years, with £20 more interest
    • 5% for 3 years, with £60 interest

All KS3 Maths quizzes