25
37
32
The numbers at the circles add up to the numbers
in the rectangles between them.
What number does each question mark represent?
Teacher:
Scroll down the
page to find the
link to the interactive, selfchecking Arithmagons.
Topics: Starter  Algebra  Arithmetic  Puzzles
Arithmagons starter from Transum. pic.twitter.com/4og2Nz6EI9
— Jenny Howard (@J3nnyHoward) March 16, 2016
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The numbers at the vertices are 10, 15 and 22.
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Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=August20
Here is the URL which will take them to a student version of this activity with many different levels of difficulty.
Transum.org/go/?to=Arithmagons
If your pupils do not have access to computers there is a printable set of Arithmagon worksheets here: