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Tiling Trial II (Posted on 2014-08-06) Difficulty: 3 of 5
A 20x21 rectangular floor needs to be tiled using square tiles that are uncuttable, non-overlapping and having integer sides.

What is the smallest total number of tiles to make this possible?

No Solution Yet Submitted by K Sengupta    
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Some Thoughts First attempt (spoiler?) | Comment 1 of 4
How about 9 tiles?

1 14X14 on the North West corner
3 7x7 on the East side,
and the rest filled using 2 6X6 and 3 2X2

There might be something better, but I am going back to work

  Posted by Steve Herman on 2014-08-06 14:21:09
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