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Squaring a Square Grid (Posted on 2009-10-10) Difficulty: 3 of 5
Place 16 nonzero base ten digits in the cells of a 4x4 square grid, with each digit occurring in a cell exactly once. The digits can be considered as forming eight 4-digit numbers, read left to right and top to bottom, each of which is a perfect square. Since there are more than nine cells, there will be an obvious repetition of digits.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
SolutionComputer solutionHarry2009-10-10 23:25:32
SolutionNon-computer solutionbrianjn2009-10-10 23:22:17
re: All nonzero?Charlie2009-10-10 15:01:39
QuestionAll nonzero?Jim Keneipp2009-10-10 13:53:28
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