The numbers at the circles add up to the numbers
in the rectangles between them.
What number does each question mark represent?
Scroll down the
page to find the
link to the interactive, self-checking Arithmagons.
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.
Click here to enter your comments.
The numbers at the vertices are 5, 8 and 10.
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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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.
Here is the URL which will take them to a student version of this activity with many different levels of difficulty.
If your pupils do not have access to computers there is a printable set of Arithmagon worksheets here: