A Maths Starter Of The Day


What is the total cost of all four cars?

Topics: Starter | Algebra | Problem Solving

  • Vijay Leckraz, Dartford Technology College
  • Let the Blue car be £x. The red car would then be Blue+£5000.Yellow is the same as Blue,so Yellow cost£x.Green cost twice as much as Blue so Green cost £2X.Green car is the same as Red car so we can write
    Green car= Red car
    solving this equation by the elimination method we have 2x-x=x-x+£5000
    which gives x=£5000
    So Blue car costs £5000
    Yellow Car costs £5000
    Green car costs £10000
    Red car costs £10000.
  • Jonny,
  • There's a slight mistake in the answer above:
    Green car = Red car
    This should be £5000.
    Enjoyed the starter though!
  • Phillipa, West Yorkshire
  • I think this is very good for when Im doing Algebra with Ks3 however can you explain how you did it as we are all baffled.
  • Vicki, Cheshire
  • It's quite simple (when you know how) really... Call the blue car B, yellow car Y, green car G and red car R.
    The blue and yellow cars cost the same so B=Y
    The green and red cost the same so G=R
    R = B + 5,000 and since G=R you can say G = B + 5,000
    G = 2Y and since Y=B you can say G = 2B
    So make these equal to each other:
    2B = B + 5,000
    B = 5,000 = Y
    G = R = 5,000 + 5,000 = 10,000
    The cars total up to 30,000.
  • Billy, Newcastle
  • This question is perfect for drawing using bars. I liked it.

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Laptops In Lessons

Teacher, do your students have access to computers such as tablets, iPads or Laptops?  This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:

However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

Here is the URL which will take them to game involving the use of money.

Student Activity



The car pictured below costs three quarters of its cost plus £4500. How much does it cost?

Mathematic Car




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