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3x3 Grid Near Magic (Posted on 2009-12-05) Difficulty: 2 of 5
N is a 3x3 square grid which is constituted by using each of the digits from 1 to 9 exactly once.

Determine the probability that the first digit minus the second digit plus the third digit in each row (reading left to right), each column (reading top to bottom), and each main diagonal (reading top to bottom) of N is the same.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Some ThoughtsI stand on the shoulders of giantsSteve Herman2009-12-06 22:15:38
re: Analytical Solution (spoiler)brianjn2009-12-06 05:26:37
SolutionAnalytical Solution (spoiler)Steve Herman2009-12-06 03:41:42
A different computer listing.brianjn2009-12-05 19:31:33
SolutionDifferent program; same answerCharlie2009-12-05 14:34:04
computer solutionDaniel2009-12-05 13:12:45
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