The Number Grid Puzzle

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Write the numbers 1 through 8 in the circles of the grid shown in the illustration so that no two numbers inside circles joined by a line differ by 1. For example, if you put a 4 in the top circle, you cannot put a 3 or a 5 in any of the circles in the row directly below it because each of those three circles is joined to the top one by a line.

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Posted: December 11, 2007
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