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International Mathematical Olympiad

File:IMO logo.svg
The logo of the International Mathematical Olympiad.

The International Mathematical Olympiad (IMO) is a six-question two-day math competition for students that have not yet gone to college and are under 20 years old. Any country may take part in it by sending a team of six students to compete.

History

The IMO has been held every year since 1959. It takes place in a different country (which is called the "host country") from year to year. However, it is often seen that this competition is dominated by the US and China.

Venue Year Date Top-ranked country[1] Refs
1  23x15px Brașov and Bucharest 1959 July 21 – July 31 22x20px Romania [2]
2  23x15px Sinaia 1960 July 18 – July 26  Czechoslovakia [2]
3  Hungary Veszprém 1961 July 6 – July 16 File:Flag of Hungary.svg Hungary [2]
4  File:Flag of the Czech Republic.svg České Budějovice 1962 July 7 – July 15 [2]
5  23x15px Warsaw and Wrocław 1963 July 5 – July 13 22x20px Soviet Union [2]
6  23x15px Moscow 1964 June 30 – July 10 [2]
7  23x15px East Berlin 1965 July 3 – July 13 [2]
8  23x15px Sofia 1966 July 1 – July 14 [2]
9  23x15px Cetinje 1967 July 2 – July 13 [2]
10  23x15px Moscow 1968 July 5 – July 18 22x20px East Germany [2]
11  23x15px Bucharest 1969 July 5 – July 20 File:Flag of Hungary.svg Hungary [2]
12  File:Flag of Hungary.svg Keszthely 1970 July 8 – July 22 [2]
13  Czechoslovakia Žilina 1971 July 10 – July 21 [2]
14  23x15px Toruń 1972 July 5 – July 17 22x20px Soviet Union [2]
15  23x15px Moscow 1973 July 5 – July 16 [2]
16  23x15px Erfurt and East Berlin 1974 July 4 – July 17 [2]
17  23x15px Burgas and Sofia 1975 July 3 – July 16 File:Flag of Hungary.svg Hungary [2]
18  23x15px Lienz 1976 July 7 – July 21 22x20px Soviet Union [2]
19  23x15px Belgrade 1977 July 1 – July 13 22x20px United States [2]
20  23x15px Bucharest 1978 July 3 – July 10 22x20px Romania [2]
21  23x15px London 1979 June 30 – July 9 22x20px Soviet Union [2]
  The 1980 IMO was due to be held in Mongolia. It was cancelled, and split into two unofficial events in Europe.[3]
22  23x15px Washington, D.C. 1981 July 8 – July 20 22x20px United States [2]
23  File:Flag of Hungary.svg Budapest 1982 July 5 – July 14 22x20px West Germany [2]
24  23x15px Paris 1983 July 1 – July 12 [2]
25  File:Flag of the Czech Republic.svg Prague 1984 June 29 – July 10 22x20px Soviet Union [2]
26  23x15px Joutsa 1985 June 29 – July 11 22x20px Romania [2]
27  23x15px Warsaw 1986 July 4 – July 15 22x20px Soviet Union
22x20px United States 		[2]
28  23x15px Havana 1987 July 5 – July 16 22x20px Romania [2]
29  23x15px Sydney and Canberra 1988 July 9 – July 21 22x20px Soviet Union [2]
30  23x15px Braunschweig 1989 July 13 – July 24 22x20px China [2]
31  23x15px Beijing 1990 July 8 – July 19 [2]
32  23x15px Sigtuna 1991 July 12 – July 23 22x20px Soviet Union [2]
33  23x15px Moscow 1992 July 10 – July 21 22x20px China [2]
34  Turkey Istanbul 1993 July 13 – July 24 [2]
35  Hong Kong Hong Kong 1994 July 8 – July 20 22x20px United States [2]
36  23x15px Toronto 1995 July 13 – July 25 22x20px China [4]
37  India Mumbai 1996 July 5 – July 17 22x20px Romania [5]
38  Argentina Mar del Plata 1997 July 18 – July 31 22x20px China [6]
39  23x15px Taipei 1998 July 10 – July 21 22x20px Iran [7]
40  23x15px Bucharest 1999 July 10 – July 22 22x20px China
22x20px Russia 		[8]
41  23x15px Daejeon 2000 July 13 – July 25 22x20px China [9]
42  23x15px Washington, D.C. 2001 July 1 – July 14 [10]
43  23x15px Glasgow 2002 July 19 – July 30 [11]
44  23x15px Tokyo 2003 July 7 – July 19 22x20px Bulgaria [12]
45  23x15px Athens 2004 July 6 – July 18 22x20px China [13]
46  23x15px Mérida 2005 July 8 – July 19 [14]
47  23x15px Ljubljana 2006 July 6 – July 18 [15]
48  File:Flag of Vietnam.svg Hanoi 2007 July 19 – July 31 22x20px Russia [16]
49  23x15px Madrid 2008 July 10 – July 22 22x20px China [17]
50  23x15px Bremen 2009 July 10 – July 22 [18]
51  Kazakhstan Astana 2010 July 2 – July 14 [19]
52  23x15px Amsterdam 2011 July 12 – July 24 [20]
53  File:Flag of Argentina.svg Mar del Plata 2012 July 4 – July 16 22x20px South Korea [21]
54  23x15px Santa Marta 2013 July 18 – July 28 22x20px China [22]
55  23x15px Cape Town 2014 July 3 – July 13 [23]
56  Thailand Chiang Mai 2015 July 4 – July 16 22x20px United States [24]
57  Hong Kong Hong Kong 2016 July 6 – July 16 [25]
58  Brazil Rio de Janeiro 2017 July 12 – July 23 22x20px South Korea [26]
59  23x15px Cluj-Napoca 2018 July 3 – July 14 22x20px United States [27]
60  23x15px Bath 2019 July 11 – July 22 22x20px China
22x20px United States 		[28]
61  23x15px Saint Petersburg 2020 September 19 – September 28 22x20px China [29][30][31][32]
62  23x15px Saint Petersburg 2021 July 7 – July 17 [33]
63  File:Flag of Norway.svg Oslo 2022 July 6 – July 16 [34][35]
64  23x15px Chiba 2023 July 2 – July 13 [36]
65  23x15px Bath 2024 July 11 – July 22 22x20px United States [37]
66  23x15px Sunshine Coast 2025 July 10 – July 20 [38]
67  23x15px Shanghai 2026 July 10 – July 20 [39]
68  File:Flag of Hungary.svg Hungary 2027 [40]
69  Saudi Arabia Saudi Arabia 2028 [41]

Results

The current ten countries with the best all-time results are as follows:[42]

Rank Country Appearances Gold Silver Bronze Honorable Mentions
1 22x20px China 36 168 36 6 0
2 22x20px United States 47 137 117 29 1
3 22x20px Russia 30 106 62 12 0
4 22x20px South Korea 34 86 74 28 7
5 File:Flag of Hungary.svg Hungary 61 85 168 107 10
6 22x20px Romania 62 78 149 110 7
7 22x20px Soviet Union[n 1] 29 77 67 45 0
8  Vietnam 45 65 111 78 2
9 22x20px Bulgaria 62 55 123 114 13
10 22x20px Germany 44 53 105 83 16

International Mathematical Olympiad Media

  • Geo prob diagram.svg

    A stage in the process of solving a problem from the AIME, part of the United States' selection process

  • IMO 2015 closing ceremony.jpg

    Some of gold medal contestants during the IMO 2015 closing ceremony, Chiang Mai Thailand

  • Zhuo Qun (Alex) Song.jpg

    Zhuo Qun Song at the 2015 IMO

References

  1. ↑ 1.0 1.1 "Ranking of countries". International Mathematical Olympiad. Retrieved 2011-06-20.
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 "Historical Record of US Teams". Mathematical Association of America. Archived from the original on 2009-11-28. Retrieved 2011-06-19.
  3. ↑ Unofficial events were held in Finland and Luxembourg in 1980. "UK IMO register". IMO register. Retrieved 2011-06-17.
  4. ↑ "IMO 1995". Canadian Mathematical Society. Archived from the original on 2008-02-29. Retrieved 2008-03-17.
  5. ↑ "IMO 1996". Canadian Mathematical Society. Archived from the original on 2008-02-23. Retrieved 2008-03-17.
  6. ↑ "IMO 1997" (in español). Argentina. Retrieved 2008-03-17.
  7. ↑ "IMO 1998". Republic of China. Archived from the original on 1998-12-05.
  8. ↑ "IMO 1999". Canadian Mathematical Society. Archived from the original on 2008-02-23. Retrieved 2008-03-17.
  9. ↑ "IMO 2000". Wolfram. Retrieved 2008-03-17.
  10. ↑ "IMO 2001". Canadian Mathematical Society. Archived from the original on 2011-05-18. Retrieved 2008-03-17.
  11. ↑ Andreescu, Titu (2004). USA & International Mathematical Olympiads 2002. Mathematical Association of America. ISBN 978-0-88385-815-8.
  12. ↑ "IMO 2003". Japan. Archived from the original on 2008-03-06. Retrieved 2008-03-17.
  13. ↑ "IMO 2004". Greece. Archived from the original on 2004-06-27.
  14. ↑ "IMO 2005". Mexico. Archived from the original on 2005-07-11.
  15. ↑ "IMO 2006". Slovenia. Archived from the original on 2009-02-28. Retrieved 2008-03-17.
  16. ↑ "IMO 2007". Vietnam. Archived from the original on 2009-02-12. Retrieved 2008-03-17.
  17. ↑ "IMO 2008". Spain. Archived from the original on 2008-02-26. Retrieved 2008-03-17.
  18. ↑ "IMO 2009" (in Deutsch). Germany. Retrieved 2008-03-17.
  19. ↑ "51st IMO 2010". IMO. Retrieved 2011-07-22.
  20. ↑ "52nd IMO 2011". IMO. Retrieved 2011-07-22.
  21. ↑ "53rd IMO 2012". IMO. Retrieved 2011-07-22.
  22. ↑ "54th International Mathematical Olympiad". Universidad Antonio Nariño. Archived from the original on January 21, 2013. Retrieved July 20, 2012.
  23. ↑ "55th IMO 2014". IMO. Retrieved 2016-09-10.
  24. ↑ "56th IMO 2015". IMO. Retrieved 2016-09-10.
  25. ↑ "57th IMO 2016". IMO. Retrieved 2016-09-10.
  26. ↑ "58th IMO 2017". IMO. Retrieved 2016-09-10.
  27. ↑ "59th IMO 2018". IMO. Retrieved 2016-09-10.
  28. ↑ "60th IMO 2019". IMO. Retrieved 2016-09-10.
  29. ↑ Becomes a virtual event due to COVID-19 pandemic.
  30. ↑ "61st IMO 2020". IMO. Retrieved 2016-09-10.
  31. ↑ "61st IMO 2020". Retrieved 2018-12-25.
  32. ↑ "Annual Regulations for IMO 2020" (PDF). Imo2020.ru. Retrieved 8 November 2021.
  33. ↑ "62nd IMO 2021 Result Table". Imo-official.org. Retrieved 2021-11-08.
  34. ↑ "63rd IMO 2022". IMO. Retrieved 2017-07-25.
  35. ↑ "63rd IMO 2022". Department of Mathematics, University of Os. Retrieved 2018-12-25.
  36. ↑ "64th IMO 2023". IMO. Retrieved 2019-07-22.
  37. ↑ "IMO2024". IMO. Retrieved 2023-07-28.
  38. ↑ "66th IMO 2025". IMO. Retrieved 2019-07-22.
  39. ↑ "67th IMO 2026". IMO. Retrieved 2023-07-28.
  40. ↑ "68th IMO 2027". IMO. Retrieved 2024-01-07.
  41. ↑ "69th IMO 2028". IMO. Retrieved 2024-08-25.
  42. ↑ "Results: Cumulative Results by Country". Imo-official.org. Archived from the original on 2017-08-04. Retrieved 2016-07-20.
Notes
  1. ↑ The Soviet Union participated the IMO for the last time in 1991. From 1992, former Soviet countries – including Russia – entered separately.[1]


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