Difference between revisions of "IMO Problems and Solutions"

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* [[2011 IMO Problems/Problem 4 | Problem 4]] proposed by Morteza Saghafiyan, Iran
 
* [[2011 IMO Problems/Problem 4 | Problem 4]] proposed by Morteza Saghafiyan, Iran
 
* [[2011 IMO Problems/Problem 5 | Problem 5]] proposed by Seyedmahyar Sefidgaran, Iran
 
* [[2011 IMO Problems/Problem 5 | Problem 5]] proposed by Seyedmahyar Sefidgaran, Iran
* [[2011 IMO Problems/Problem 6 | Problem 6]] proposed by Japan
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* [[2011 IMO Problems/Problem 6 | Problem 6]] proposed by Japanese PSC, Japan
  
 
== 2012 ==
 
== 2012 ==
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* [[2013 IMO]] (in Colombia)
 
* [[2013 IMO]] (in Colombia)
* [[2013 IMO Problems/Problem 1 | Problem 1]] proposed by Japan
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* [[2013 IMO Problems/Problem 1 | Problem 1]] proposed by Japanese PSC, Japan
 
* [[2013 IMO Problems/Problem 2 | Problem 2]] proposed by Ivan Guo, Australia
 
* [[2013 IMO Problems/Problem 2 | Problem 2]] proposed by Ivan Guo, Australia
 
* [[2013 IMO Problems/Problem 3 | Problem 3]] proposed by Alexander A. Polyansky, Russia
 
* [[2013 IMO Problems/Problem 3 | Problem 3]] proposed by Alexander A. Polyansky, Russia
 
* [[2013 IMO Problems/Problem 4 | Problem 4]] proposed by Warut Suksompong and Potcharapol Suteparuk, Thailand
 
* [[2013 IMO Problems/Problem 4 | Problem 4]] proposed by Warut Suksompong and Potcharapol Suteparuk, Thailand
 
* [[2013 IMO Problems/Problem 5 | Problem 5]] proposed by Nikolai Nikolov, Bulgaria  
 
* [[2013 IMO Problems/Problem 5 | Problem 5]] proposed by Nikolai Nikolov, Bulgaria  
* [[2013 IMO Problems/Problem 6 | Problem 6]] proposed by Alexander S. Golovanov and Mikhail A.Ivanov, Russia
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* [[2013 IMO Problems/Problem 6 | Problem 6]] proposed by Alexander S. Golovanov and Mikhail A. Ivanov, Russia
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== 2014 ==
 +
 
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* [[2014 IMO]] (in South Africa)
 +
* [[2014 IMO Problems/Problem 1 | Problem 1]] proposed by Gerhard Woeginger, Austria
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* [[2014 IMO Problems/Problem 2 | Problem 2]] proposed by Tonči Kokan, Croatia
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* [[2014 IMO Problems/Problem 3 | Problem 3]] proposed by Ali Zamani, Iran
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* [[2014 IMO Problems/Problem 4 | Problem 4]] proposed by Giorgi Arabidze, Georgia
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* [[2014 IMO Problems/Problem 5 | Problem 5]] proposed by Gerhard Woeginger, Luxembourg
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* [[2014 IMO Problems/Problem 6 | Problem 6]] proposed by Gerhard Woeginger, Austria
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== 2015 ==
 +
 
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* [[2015 IMO]] (in Thailand)
 +
* [[2015 IMO Problems/Problem 1 | Problem 1]] proposed by Merlijn Staps, Netherlands
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* [[2015 IMO Problems/Problem 2 | Problem 2]] proposed by Dušan Djukić, Serbia
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* [[2015 IMO Problems/Problem 3 | Problem 3]] proposed by Danylo Khilko and Mykhailo Plotnikov, Ukraine
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* [[2015 IMO Problems/Problem 4 | Problem 4]] proposed by Silouanos Brazitikos and Evangelos Psychas, Greece
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* [[2015 IMO Problems/Problem 5 | Problem 5]] proposed by Dorlir Ahmeti, Albania
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* [[2015 IMO Problems/Problem 6 | Problem 6]] proposed by Ross Atkins and Ivan Guo, Australia
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 +
== 2016 ==
 +
 
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* [[2016 IMO]] (in Hong Kong)
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* [[2016 IMO Problems/Problem 1 | Problem 1]] proposed by Art Waeterschoot, Belgium
 +
* [[2016 IMO Problems/Problem 2 | Problem 2]] proposed by Trevor Tao, Australia
 +
* [[2016 IMO Problems/Problem 3 | Problem 3]] proposed by Aleksandr Gaifullin, Russia
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* [[2016 IMO Problems/Problem 4 | Problem 4]] proposed by Gerhard Woeginger, Luxembourg
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* [[2016 IMO Problems/Problem 5 | Problem 5]] proposed by Nazar Agakhanov and Ilya Bogdanov, Russia
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* [[2016 IMO Problems/Problem 6 | Problem 6]] proposed by Josef Tkadlec, Czech Republic
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== 2017 ==
 +
 
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* [[2017 IMO]] (in Brazil)
 +
* [[2017 IMO Problems/Problem 1 | Problem 1]] proposed by Stephan Wagner, South Africa
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* [[2017 IMO Problems/Problem 2 | Problem 2]] proposed by Dorlir Ahmeti, Albania
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* [[2017 IMO Problems/Problem 3 | Problem 3]] proposed by Gerhard Woeginger, Austria
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* [[2017 IMO Problems/Problem 4 | Problem 4]] proposed by Charles Leytem, Luxembourg
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* [[2017 IMO Problems/Problem 5 | Problem 5]] proposed by Grigory Chelnokov, Russia
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* [[2017 IMO Problems/Problem 6 | Problem 6]] proposed by John Berman, USA
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== 2018 ==
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* [[2018 IMO]] (in Romania)
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* [[2018 IMO Problems/Problem 1 | Problem 1]] proposed by Silouanos Brazitikos, Evangelos Psychas and Michael Sarantis, Greece
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* [[2018 IMO Problems/Problem 2 | Problem 2]] proposed by Patrik Bak, Slovakia
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* [[2018 IMO Problems/Problem 3 | Problem 3]] proposed by Morteza Saghafian, Iran
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* [[2018 IMO Problems/Problem 4 | Problem 4]] proposed by Gurgen Asatryan, Armenia
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* [[2018 IMO Problems/Problem 5 | Problem 5]] proposed by Bayarmagnai Gombodorj, Mongolia
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* [[2018 IMO Problems/Problem 6 | Problem 6]] proposed by Tomasz Ciesla, Poland
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 +
== 2019 ==
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* [[2019 IMO]] (in England)
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* [[2019 IMO Problems/Problem 1 | Problem 1]] proposed by Liam Baker, South Africa
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* [[2019 IMO Problems/Problem 2 | Problem 2]] proposed by Anton Trygub, Ukraine
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* [[2019 IMO Problems/Problem 3 | Problem 3]] proposed by Adrian Beker, Croatia
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* [[2019 IMO Problems/Problem 4 | Problem 4]] proposed by Gabriel Chicas Reyes, El Salvador
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* [[2019 IMO Problems/Problem 5 | Problem 5]] proposed by David Altizio, USA
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* [[2019 IMO Problems/Problem 6 | Problem 6]] proposed by Anant Mudgal, India
  
 
== Comment ==
 
== Comment ==
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== See also ==
 
== See also ==
  
* [[IMO problems statistics]]
+
* [[IMO problems statistics]] (eternal)
 +
* [[IMO problems statistics since 2000]] (modern history)
 
* [http://www.artofproblemsolving.com/Forum/resources.php?c=1&cid=16 IMO problems on the Resources page]
 
* [http://www.artofproblemsolving.com/Forum/resources.php?c=1&cid=16 IMO problems on the Resources page]
 
* [[IMO Shortlist Problems]]
 
* [[IMO Shortlist Problems]]

Revision as of 13:08, 18 July 2019

This page lists the authors and the proposing countries of the problems of the IMO.

1959

1960

1961

1962

1963

1964

1965

1966

1967

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

  • 1979 IMO (in United Kingdom)
  • Problem 1 proposed by Arthur Engel, West Germany
  • Problem 2 proposed by Nickolay Khadzhiivanov and Nedjalko Nenov, Bulgaria
  • Problem 3 proposed by Nikolai Vasil'ev and Igor F. Sharygin, USSR
  • Problem 4 proposed by Murray Klamkin, USA
  • Problem 5 proposed by Joe Gillis, Israel
  • Problem 6 proposed by Arthur Engel, West Germany

1980

There was no IMO in 1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

  • 1994 IMO (in Hong Kong)
  • Problem 1 proposed by Vincent Lafforgue, France
  • Problem 2 proposed by Hans Lausch, Australia and Garnik Tonoyan, Armenia (independently)
  • Problem 3 proposed by Gabriel Istrate, Romania
  • Problem 4 proposed by Hans Lausch, Australia
  • Problem 5 proposed by David Monk, United Kingdom
  • Problem 6 proposed by Kerkko Luosto, Finland

1995

1996

1997

  • 1997 IMO (in Argentina)
  • Problem 1 proposed by Igor Akylich and Igor Voronovich, Belarus
  • Problem 2 proposed by David Monk, United Kingdom
  • Problem 3 proposed by Oleg Bogopolsky, Russia
  • Problem 4 proposed by Ebadollah S. Mahmoodian and Mohammad Mahdian, Iran
  • Problem 5 proposed by Petr Kanovsky, Czech Republic
  • Problem 6 proposed by Giedrius Alkauskas, Lithuania

1998

1999

2000

2001

  • 2001 IMO (in USA)
  • Problem 1 proposed by Hojoo Lee, South Korea
  • Problem 2 proposed by Hojoo Lee, South Korea
  • Problem 3 proposed by Christian Bey, Germany
  • Problem 4 proposed by Bill Sands, Canada
  • Problem 5 proposed by Shay Gueron, Israel. (Also: Problem 2501 in Crux Mathematicorum, February 2000)
  • Problem 6 proposed by Aleksander Ivanov, Bulgaria

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

  • 2013 IMO (in Colombia)
  • Problem 1 proposed by Japanese PSC, Japan
  • Problem 2 proposed by Ivan Guo, Australia
  • Problem 3 proposed by Alexander A. Polyansky, Russia
  • Problem 4 proposed by Warut Suksompong and Potcharapol Suteparuk, Thailand
  • Problem 5 proposed by Nikolai Nikolov, Bulgaria
  • Problem 6 proposed by Alexander S. Golovanov and Mikhail A. Ivanov, Russia

2014

2015

  • 2015 IMO (in Thailand)
  • Problem 1 proposed by Merlijn Staps, Netherlands
  • Problem 2 proposed by Dušan Djukić, Serbia
  • Problem 3 proposed by Danylo Khilko and Mykhailo Plotnikov, Ukraine
  • Problem 4 proposed by Silouanos Brazitikos and Evangelos Psychas, Greece
  • Problem 5 proposed by Dorlir Ahmeti, Albania
  • Problem 6 proposed by Ross Atkins and Ivan Guo, Australia

2016

2017

2018

  • 2018 IMO (in Romania)
  • Problem 1 proposed by Silouanos Brazitikos, Evangelos Psychas and Michael Sarantis, Greece
  • Problem 2 proposed by Patrik Bak, Slovakia
  • Problem 3 proposed by Morteza Saghafian, Iran
  • Problem 4 proposed by Gurgen Asatryan, Armenia
  • Problem 5 proposed by Bayarmagnai Gombodorj, Mongolia
  • Problem 6 proposed by Tomasz Ciesla, Poland

2019

Comment

This page lists the authors and the proposing countries of the problems of the IMO.

For many problems, the composers do not have the nationality of the proposing country. For instance, problem 2009/4 was proposed by Belgium, but only two of the three problem authors were Belgian, whereas the third is from South-Korea.

To the current moment, there is only a single IMO problem that has two distinct proposing countries: The if-part of problem 1994/2 was proposed by Australia and its only-if part by Armenia.

See also