The inclusion of "297" and "hot" in your search likely refers to a specific page range, a set of "Hot Questions" (high-probability problems), or a specific edition of the PDF that has gained traction in student forums.
"Find all integers n such that n^2 + 5n + 6 is a perfect square." rajeev manocha maths olympiad pdf 297 hot
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It teaches the coprime product property , which appears in 30% of IMO number theory problems. By mastering one #297-type problem, you unlock a dozen others. As of now, there is of “297 Hot”
As of now, there is of “297 Hot” from the original publisher. If you see a PDF claiming to be official, it’s almost certainly a scan of the print edition — and sharing it is piracy.