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Four P Pentominoes (Posted on 2016-03-04) Difficulty: 3 of 5
Four copies of the P pentomino pictured below can easily be placed in a 5x5 square without overlapping.
+--+--+--+
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+--+--+
Prove it is impossible to put 5 copies in a 5x5 square without overlapping.

Which of the other 11 pentominoes can be included with four P pentominoes such that all five can be placed in a 5x5 square?

See The Solution Submitted by Brian Smith    
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Comments: ( Back to comment list | You must be logged in to post comments.)
Good work Comment 4 of 4 |
The official solution is interesting and nicely explained. 

Edited on March 5, 2016, 5:05 pm
  Posted by armando on 2016-03-05 17:02:41

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