2026
China
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
IMO Problems
The oldest of the international science olympiads, first held in Brașov in 1959 with seven countries. Teams of six sit three problems a day over two days, four and a half hours each. The IMO publishes no solutions to the exam itself, so the Shortlist below is where the official ones are.
2025
Australia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2024
United Kingdom
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2023
Japan
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2022
Norway
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2021
Russia (remote)
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2020
Russia (remote)
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2019
United Kingdom
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2018
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2017
Brazil
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2016
Hong Kong
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2015
Thailand
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2014
South Africa
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2013
Colombia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2012
Argentina
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2011
Netherlands
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2010
Kazakhstan
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2009
Germany
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2008
Spain
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2007
Vietnam
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2006
Slovenia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
ShortlistProblems and solutions
2005
Mexico
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
2004
Greece
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
2003
Japan
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
2002
United Kingdom
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
2001
USA
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
2000
South Korea
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1999
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1998
Taiwan
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1997
Argentina
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1996
India
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1995
Canada
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1994
Hong Kong
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1993
Turkey
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1992
Russia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1991
Sweden
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1990
China
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1989
West Germany
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1988
Australia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1987
Cuba
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1986
Poland
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1985
Finland
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1984
Czechoslovakia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1983
France
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1982
Hungary
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1981
USA
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1979
United Kingdom
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1978
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1977
Yugoslavia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1976
Austria
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1975
Bulgaria
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1974
East Germany
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1973
Soviet Union
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1972
Poland
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1971
Czechoslovakia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1970
Hungary
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1969
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1968
Soviet Union
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1967
Yugoslavia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1966
Bulgaria
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1965
East Germany
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1964
Soviet Union
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1963
Poland
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1962
Czechoslovakia
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
- 7Problem 7not published
1961
Hungary
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
1960
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published
- 7Problem 7not published
1959
Romania
- 1Problem 1not published
- 2Problem 2not published
- 3Problem 3not published
- 4Problem 4not published
- 5Problem 5not published
- 6Problem 6not published