Sun Apple

Drag the numbers onto the grid so that the sum of the four numbers around a circle add up to the total given in the circle.


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A Mathematics Lesson Starter Of The Day


Topics: Starter | Mental Methods | Problem Solving | Puzzles

  • Transum,
  • Clicking on the 'New Puzzle' button above with take you to a version of this puzzle with more options. You will be able to choose how many numbers are already placed on the grid by using clue buttons. There is also the option to try Sujiko which does not have the colour area totals.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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This starter has scored a mean of 3.1 out of 5 based on 128 votes.

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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.

Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

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 a self-checking, interactive version of this puzzle.

Student Activity


Suko and Sujiko were developed by Kobayaashi Studios and permission to use the idea here has been kindly granted by their syndication agents,


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