IMO Problems and Solutions

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

  • 2007 IMO (in Vietnam)
  • Problem 1 proposed by Michael Albert, New Zealand
  • Problem 2 proposed by Charles Leytem, Luxembourg
  • Problem 3 proposed by Vasily Astakhov, Russia
  • Problem 4 proposed by Marek Pechal, Czech Republic
  • Problem 5 proposed by Kevin Buzzard and Edward Crane, United Kingdom
  • Problem 6 proposed by Gerhard Woeginger, Netherlands

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

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

ACS WASC
ACCREDITED
SCHOOL

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