Sum of the Signs

Road Sign Road Sign Road Sign Road Sign = 32
Road Sign Road Sign Road Sign Road Sign = ?
Road Sign Road Sign Road Sign Road Sign = ?
Road Sign Road Sign Road Sign Road Sign = 24
= 21 = 44 = ? = ?  

Each traffic sign stands for a number. Some of the sums of rows or columns are shown. What numbers might the signs stand for?

[Teacher: Press the F11 key and hide the remaining toolbar to show the whole of this grid if it doesn't fit on your screen]

A Mathematics Lesson Starter Of The Day


Topics: Starter | Algebra | Logic | Problem Solving | Puzzles | Simultaneous Equations

  • Mr. H, Mary Hare School
  • Chloe found a different solution.
  • The Best Maths Class Ever. 7cd/M2, King Alfred's College, Oxfordshire UK
  • Jack, Georgina and Patrick found the solution very quickly. Olivia found out that the top column was the same as the right side column. Some of us found it hard (including sir!!).
  • Year 9, Leicester
  • Very hard and dodgy answers!
    Maybe a good starter for older classes.
  • Transum,
  • Thanks for the comments above. They refer to the randomly generated puzzle which you can see by pressing the button below. The puzzle you see the first time you visit this page should be reasonable for a 10 to 14 year old to solve and has a unique solution. Let us know how it works for your students.
  • Apex Year5/6, Apex Primary
  • At Apex, our year5/6 class found is quite easy! but a good starter :).
  • Selina, Stanwell Fields
  • Easy for us 6 year 6.
  • Karris, Oxford University
  • Easy! The Class love it.
  • Mrs Webster, Brackenwood Junior School
  • On the whole Y4 enjoyed this task but some children found it quite tricky.
  • Mjd School, 6
  • This is cool for the year 6.
  • 8E, Friary
  • 8E at Friary School found this 'a bit easy'! Something a bit more challenging please!

    [Transum: Well done 8E. Did you scroll down the page and see the extension?]

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This starter has scored a mean of 3.2 out of 5 based on 504 votes.

Previous Day | This starter is for 11 March | Next Day



Road Sign = 11   Road Sign = 2
Road Sign = 5   Road Sign = 3

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

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Texas Instruments Nspire Calculator

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Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.

Here is the URL which will take them to another problem solving activity.

Student Activity


The answer to this puzzle is not 12. What is it?


Extension Answers


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