Difference between revisions of "2001 IMO Shortlist Problems/N1"
(New page: == Problem == Prove that there is no positive integer <math>n</math> such that, for <math>k = 1,2,\ldots,9</math>, the leftmost digit (in decimal notation) of <math>(n + k)!</math> equals ...) |
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Revision as of 18:54, 20 August 2008
Problem
Prove that there is no positive integer 
such that, for 
, the leftmost digit (in decimal notation) of 
equals 
.
Solution
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