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Some Digits Sum 37 (Posted on 2009-06-04) Difficulty: 2 of 5
Determine all possible positive base ten repdigit(s) N, such that the sum of the digits of N2 is equal to 37.

No Solution Yet Submitted by K Sengupta    
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Some Thoughts re: computer solution (a quibble) | Comment 2 of 4 |
(In reply to computer solution by Charlie)

A minor problem with the solution method.  n^2 could have more than 37 digits, if some of them are zero.  Most of the non-zero ones would need to be 1, so this isn't a practical objection, but I think the program should check for repunits with more than 19 digits, just in case. 
  Posted by Steve Herman on 2009-06-04 15:21:11

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