I want to prepare for math olympiad. IMO website provides the questions for past math olympiad. Where can I find the solutions of past IMO problems?
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1Is it no longer the case that the national teams undergo some training and in that context (among others) walk through a lot of past problems? – Hagen von Eitzen Jan 20 '19 at 17:54
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1I have searched and found solutions to many olympiad problems in the past. Often the same site with the problems has the solutions. What have you tried? – Ross Millikan Jan 20 '19 at 17:59
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1You can go through AoPS – Dr. Sonnhard Graubner Jan 20 '19 at 18:48
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Here's just a few off the top of my head (I'm sure there are more):
The AOPS IMO Collection contains virtually every IMO problem hosted on its online forum, and almost all of the questions have user-written solutions and problem discussions in the comments. In addition, AOPS contains many other contest collections from various national and international Olympiads.
On the official IMO website, you can download the problem shortlists for certain years. These contain all of the shortlisted problems (which include the 'official exam' problems) and their respective solutions.
imomath.com contains a database of problems - Additionally, the website has published The IMO Compendium, which contains problems and solutions to all shortlisted problems from 1959-2009.
In addition, John Scholes runs a site containing all IMO problems and solutions from 1959 to 2003.
Note that the above are all 'databases' for IMO questions. In general for a specific question, if you just search your question, you'll probably come across a solution somewhere, whether it be on this site or somewhere else.
user574848
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imomath.com has only the collection, not the solutions. Better go official site here : https://www.imo-official.org/problems.aspx
it has practically all shortlists from 2006 to 2017, together with solutions. for previous years, simply use google
– TBTD Jan 21 '19 at 10:02 -
@Aaron Hm, my memory hasn't served me very well - thanks for the correction. I've still got the link to the official site above. – user574848 Jan 21 '19 at 10:51
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user574848, yes, realized you have exact same link. one more thing: Scholes' site (kalva) has not been active anymore. The versions that you've linked are accessed by some people. – TBTD Jan 21 '19 at 11:55