Talk:2003 USAMO Problems/Problem 1

Revision as of 20:34, 29 April 2014 by Mathcool2009 (talk | contribs)
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\\By the way Solution 2 is incorrect--subtracting b from a where both a and b have the same number of digits and have only odd digits does not necessarily result in a difference with all odd digits. Consider 73 minus 35. Both have only odd digits, and yet 73 - 35 = 38, which does not have only odd digits.//--Mathcool2009 20:28, 29 April 2014 (EDT)

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