ISL 2006 N7
Prove that, for every positive integer , there exists an integer such that is divisible by . (Estonia)
Official text Transcription from NuminaMath olympiads, checked word for word against the official paper. Quoted with source.
Official text: IMO 2006 Shortlist booklet, page 64.
Solutions
Official solution Solution 1 by the IMO Problem Selection Committee
The terms of the source let olymmath link to this solution but not copy it. Read the solution (IMO official site).