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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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  Subject Author Date
re(3): computer solutionsCharlie2016-02-14 20:05:51
re(2): computer solutionsBrian Smith2016-02-14 17:54:31
re: computer solutionsJer2016-02-14 15:30:09
Solutioncomputer solutionsCharlie2016-02-14 15:03:30
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