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'Weekly Problem 27 - 2008' printed from http://nrich.maths.org/

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SQuares

In the diagram on the right, how many squares, of any size, are there whose entries add up to an even total?

 

 

 

 

 

 

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

 

 

This problem is taken from the UKMT Mathematical Challenges.

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