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Factorial Difference = Perfect Square (Posted on 2011-03-28) Difficulty: 3 of 5
Determine all possible pair(s) (x, y) of nonnegative integers such that (x!*y! - x! - y!) is a perfect square.

No Solution Yet Submitted by K Sengupta    
Rating: 2.5000 (2 votes)

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  Subject Author Date
possible solutionbroll2011-03-29 03:06:23
re: possible pairsCharlie2011-03-28 14:29:09
possible pairsDej Mar2011-03-28 11:39:42
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