IMO Shortlist 2007 problem N3
Dodao/la: arhiva2. travnja 2012.
be a set of 10,000 integers, none of them is divisible by 47. Prove that there exists a 2007-element subset
is not divisible by 47 for any
Author: Gerhard Wöginger, Netherlands
Izvor: Međunarodna matematička olimpijada, shortlist 2007