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Even Digit Perfect Square(s) (Posted on 2008-10-25) Difficulty: 3 of 5
Determine all possible 7-digit decimal (base 10) perfect square(s), each of whose digits is nonzero and even.

Note: While a solution is trivial with the aid of a computer program, show how to derive it without one.

See The Solution Submitted by K Sengupta    
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Question re: solution TRUE BUT WHY | Comment 9 of 10 |
(In reply to solution by Dej Mar)

....As the final digit must be non-zero and even, D must be 2 or 8; and the 100-digit digit must be 4

Why not 4 or 6??


  Posted by Ady TZIDON on 2008-10-27 05:39:47
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