IMO Shortlist 2007 problem N6
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Avg: 0.0Težina:
Avg: 8.0 Let
be a positive integer. Prove that the number
has a positive divisor of the form
if and only if
is even.
Actual IMO 2007 Problem, posed as question 5 in the contest, which was used as a lemma in the official solutions for problem N6 as shown above.
Author: Kevin Buzzard and Edward Crane, United Kingdom




Actual IMO 2007 Problem, posed as question 5 in the contest, which was used as a lemma in the official solutions for problem N6 as shown above.
Author: Kevin Buzzard and Edward Crane, United Kingdom
Source: Međunarodna matematička olimpijada, shortlist 2007