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Big difference (Posted on 2016-02-14) Difficulty: 3 of 5
Using all integers from 1 to 20, assign them into a 5 by 4 grid so that adjacent numbers (horizontally, vertically and diagonally) will differ by at least 4.

No Solution Yet Submitted by Ady TZIDON    
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re: computer solutions | Comment 2 of 4 |
(In reply to computer solutions by Charlie)

I didn't try this by hand so I don't know how difficult that would be.

I'm curious if there are solutions with minimum difference 5 (or 6 etc.)

  Posted by Jer on 2016-02-14 15:30:09

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