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Folded A4

Stage: 3 Short Challenge Level: Challenge Level:1
See all short problems arranged by curriculum topic in the short problems collection

A sheet of A4 size paper (297mm x 210mm) is folded once and then laid flat on the table.

Which of these shapes could not be made?

 



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.