List of International Mathematical Olympiads
The first of the International Mathematical Olympiads (IMOs) was held in Romania in 1959. The oldest of the International Science Olympiads, the IMO has since been held annually, except in 1980. That year, the competition initially planned to be held in Mongolia was cancelled due to the Soviet invasion of Afghanistan.[1] Because the competition was initially founded for Eastern European countries participating in the Warsaw Pact, under the influence of the Eastern Bloc,[2] the earlier IMOs were hosted only in Eastern European countries, gradually spreading to other nations.[3] Sources differ about the cities hosting some of the early IMOs and the exact dates when they took place.[4]
![A circle, interlinked with a sideways figure of eight (lemniscate). The circle is half green and half yellow, the lemniscate is a third red, a third blue and a third black. The shapes are featured in front of a white background.](../I/IMO_logo.svg.png.webp)
The first IMO was held in Romania in 1959. Seven countries entered – Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, Romania and the Soviet Union – with the hosts finishing as the top-ranked nation.[5] The number of participating countries has since risen: 14 countries took part in 1969, 50 in 1989, and 104 in 2009.[6]
North Korea is the only country to have been caught cheating, resulting in its disqualification at the 32nd IMO in 1991 and the 51st IMO in 2010.[7] In January 2011, Google gave €1 million to the IMO organization to help cover the costs of the events from 2011 to 2015.[8]
List of Olympiads
![Four men in black suits with bluish-white dress shirts and brightly-coloured ties standing in front of a wall composed of wooden panels.](../I/Perfect-scorers.jpg.webp)
![Ten people facing forward, in two lines of five. In the front row are five boys in their late teens. Behind them are four adults, and one person who appears to be in his late teens.](../I/Bdimoteam09.JPG.webp)
![Six boys, standing on a line, all wearing white tops with red logos on their chest. They are holding a red, blue and white striped flag, which features a prominent crown and coat of arms.](../I/Matemati%C4%8Dka_gimnazija_-_Mathematical_Gymnasium_Belgrade_-_MGB_-_IMO_2010_-_pic3.jpg.webp)
![](../I/IMO_2015_closing_ceremony.jpg.webp)
#[6] | Venue | Year | Date[6] | Top-ranked country[9] | References |
---|---|---|---|---|---|
1 | ![]() |
1959 | June 23 – July 31 | ![]() |
[10] |
2 | ![]() |
1960 | July 18 – July 25 | ![]() |
[10] |
3 | ![]() |
1961 | July 6 – July 16 | ![]() |
[10] |
4 | ![]() |
1962 | July 7 – July 15 | ![]() |
[10] |
5 | ![]() |
1963 | July 5 – July 13 | ![]() |
[10] |
6 | ![]() |
1964 | June 30 – July 10 | ![]() |
[10] |
7 | ![]() |
1965 | June 13 – July 13 | ![]() |
[10] |
8 | ![]() |
1966 | July 3 – July 13 | ![]() |
[10] |
9 | ![]() |
1967 | July 7 – July 13 | ![]() |
[10] |
10 | ![]() |
1968 | July 5 – July 18 | ![]() |
[10] |
11 | ![]() |
1969 | July 5 – July 20 | ![]() |
[10] |
12 | ![]() |
1970 | July 8 – July 22 | ![]() |
[10] |
13 | ![]() |
1971 | July 10 – July 21 | ![]() |
[10] |
14 | ![]() |
1972 | July 5 – July 17 | ![]() |
[10] |
15 | ![]() |
1973 | July 5 – July 16 | ![]() |
[10] |
16 | ![]() |
1974 | July 4 – July 17 | ![]() |
[10] |
17 | ![]() |
1975 | July 3 – July 16 | ![]() |
[10] |
18 | ![]() |
1976 | July 2 – July 21 | ![]() |
[10] |
19 | ![]() |
1977 | July 1 – July 13 | ![]() |
[10] |
20 | ![]() |
1978 | July 3 – July 10 | ![]() |
[10] |
21 | ![]() |
1979 | June 30 – July 9 | ![]() |
[10] |
- | The 1980 IMO was due to be held in Mongolia. It was cancelled, and split into two unofficial events in Europe.[1] | ||||
22 | ![]() |
1981 | July 8 – July 20 | ![]() |
[10] |
23 | ![]() |
1982 | July 5 – July 14 | ![]() |
[10] |
24 | ![]() |
1983 | July 3 – July 12 | ![]() |
[10] |
25 | ![]() |
1984 | June 29 – July 10 | ![]() |
[10] |
26 | ![]() |
1985 | June 29 – July 11 | ![]() |
[10] |
27 | ![]() |
1986 | July 4 – July 15 | ![]() ![]() |
[10] |
28 | ![]() |
1987 | July 5 – July 16 | ![]() |
[10] |
29 | ![]() |
1988 | July 9 – July 21 | ![]() |
[10] |
30 | ![]() |
1989 | July 13 – July 24 | ![]() |
[10] |
31 | ![]() |
1990 | July 8 – July 19 | ![]() |
[10] |
32 | ![]() |
1991 | July 12 – July 23 | ![]() |
[10][n 1] |
33 | ![]() |
1992 | July 10 – July 21 | ![]() |
[10] |
34 | ![]() |
1993 | July 13 – July 24 | ![]() |
[10] |
35 | ![]() |
1994 | July 8 – July 20 | ![]() |
[10] |
36 | ![]() |
1995 | July 13 – July 25 | ![]() |
[11] |
37 | ![]() |
1996 | July 5 – July 17 | ![]() |
[12] |
38 | ![]() |
1997 | July 18 – July 31 | ![]() |
[13] |
39 | ![]() |
1998 | July 10 – July 21 | ![]() |
[14] |
40 | ![]() |
1999 | July 10 – July 22 | ![]() ![]() |
[15] |
41 | ![]() |
2000 | July 13 – July 25 | ![]() |
[16] |
42 | ![]() |
2001 | July 1 – July 14 | ![]() |
[17] |
43 | ![]() |
2002 | July 19 – July 30 | ![]() |
[18] |
44 | ![]() |
2003 | July 7 – July 19 | ![]() |
[19] |
45 | ![]() |
2004 | July 6 – July 18 | ![]() |
[20] |
46 | ![]() |
2005 | July 8 – July 19 | ![]() |
[21] |
47 | ![]() |
2006 | July 6 – July 18 | ![]() |
[22] |
48 | ![]() |
2007 | July 19 – July 31 | ![]() |
[23] |
49 | ![]() |
2008 | July 10 – July 22 | ![]() |
[24] |
50 | ![]() |
2009 | July 10 – July 22 | ![]() |
[25] |
51 | ![]() |
2010 | July 2 – July 14 | ![]() |
[26] |
52 | ![]() |
2011 | July 13 – July 24 | ![]() |
[27] |
53 | ![]() |
2012 | July 4 – July 16 | ![]() |
[28] |
54 | ![]() |
2013 | July 18 – July 28 | ![]() |
[29] |
55 | ![]() |
2014 | July 3 – July 13 | ![]() |
[30] |
56 | ![]() |
2015 | July 4 – July 16 | ![]() |
[31] |
57 | ![]() |
2016 | July 6 – July 16 | ![]() |
[32] |
58 | ![]() |
2017 | July 12 – July 23 | ![]() |
[33] |
59 | ![]() |
2018 | July 3 – July 14 | ![]() |
[34] |
60 | ![]() |
2019 | July 11 – July 22 | ![]() ![]() |
[35] |
61 | ![]() |
2020 | September 19 – September 28 | ![]() |
[37][38] |
62 | ![]() |
2021 | July 14 – July 24 | ![]() |
[40] |
63 | ![]() |
2022 | July 6 – July 16 | ![]() |
[41] |
64 | ![]() |
2023 | July 2 – July 13 | ![]() |
[42] |
65 | ![]() |
2024 | July 11 – July 22 | TBD | [45] |
66 | ![]() |
2025 | TBD | TBD | [46] |
67 | ![]() |
2026 | TBD | TBD | [47] |
See also
Notes
- 1991 marked the Soviet Union's last participation. From 1992, former Soviet Union countries – including Russia – entered separately.[9]
- At the time of the Olympiad, Hong Kong was under British colonial rule.
- Following the COVID-19 pandemic, the 2020 IMO was postponed from July to September hoping to keep the competition in-person. Then it was changed to a virtual event.[36]
- The 2021 IMO was originally to be held in Washington D.C., US. The US gave up hosting after the COVID-19 pandemic had started.[39][36]
- The originally determined location for hosting the 2024 IMO was Ukraine. Due to the recent conflicts between the country and Russia, the location was changed to Bath, in which the 2019 IMO was hosted.[43][44]
References
- Unofficial events were held in Finland and Luxembourg in 1980. "UK IMO register". IMO register. Retrieved 2011-06-17.
- "More IMO Facts". Retrieved 2008-03-05.
- "Singapore International Mathematical Olympiad (SIMO) Home Page". Singapore Mathematical Society. Retrieved 2008-02-04.
- "Norwegian Students in International Mathematical Olympiad". Archived from the original on 2006-10-20. Retrieved 2008-03-05.
- "1st IMO 1959". International Mathematical Olympiad. Retrieved 2011-06-20.
- "Timeline". International Mathematical Olympiad. Retrieved 2011-06-20.
- "International Mathematical Olympiad: Democratic People's Republic of Korea". Retrieved 2010-07-17.
- Google Europe Blog: Giving young mathematicians the chance to shine. Googlepolicyeurope.blogspot.com (2011-01-21). Retrieved on 2013-10-29.
- "Ranking of countries". International Mathematical Olympiad. Retrieved 2011-06-20.
- "US teams at the IMO". Mathematical Association of America. Archived from the original on 2011-07-27. Retrieved 2011-06-19.
- "IMO 1995". Canadian Mathematical Society. Archived from the original on 2008-02-29. Retrieved 2008-03-17.
- "IMO 1996". Canadian Mathematical Society. Archived from the original on 2008-02-23. Retrieved 2008-03-17.
- "IMO 1997" (in Spanish). Argentina. Retrieved 2008-03-17.
- "IMO 1998". Republic of China. Archived from the original on 1998-12-05.
- "IMO 1999". Canadian Mathematical Society. Archived from the original on 2008-02-23. Retrieved 2008-03-17.
- "IMO 2000". Wolfram. Retrieved 2008-03-17.
- "IMO 2001". Canadian Mathematical Society. Archived from the original on 2011-05-18. Retrieved 2008-03-17.
- Andreescu, Titu (2004). USA & International Mathematical Olympiads 2002. Mathematical Association of America. ISBN 978-0-88385-815-8.
- "IMO 2003". Japan. Archived from the original on 2008-03-06. Retrieved 2008-03-17.
- "IMO 2004". Greece. Archived from the original on 2004-06-27.
- "IMO 2005". Mexico. Archived from the original on 2005-07-11.
- "IMO 2006". Slovenia. Archived from the original on 2009-02-28. Retrieved 2008-03-17.
- "IMO 2007". Vietnam. Archived from the original on 2009-02-12. Retrieved 2008-03-17.
- "IMO 2008". Spain. Retrieved 2008-03-17.
- "IMO 2009" (in German). Germany. Retrieved 2008-03-17.
- "51st IMO 2010". IMO. Retrieved 2011-07-22.
- "52nd IMO 2011". IMO. Retrieved 2011-07-22.
- "53rd IMO 2012". IMO. Retrieved 2011-07-22.
- "54th International Mathematical Olympiad". Universidad Antonio Nariño. Archived from the original on January 21, 2013. Retrieved July 20, 2012.
- "55th IMO 2014". IMO. Retrieved 2016-09-10.
- "56th IMO 2015". IMO. Retrieved 2016-09-10.
- "57th IMO 2016". IMO. Retrieved 2016-09-10.
- "58th IMO 2017". IMO. Retrieved 2016-09-10.
- "59th IMO 2018". IMO. Retrieved 2016-09-10.
- "60th IMO 2019". IMO. Retrieved 2016-09-10.
- "Virtual IMO 2020 – Russia". International Mathematical Olympiad Foundation. 2020-07-11. Retrieved 2022-07-16.
- "61st IMO 2020". IMO. Retrieved 2020-11-10.
- "Annual Regulations for IMO 2020" (PDF).
- "Original IMO 2021 site". Archived from the original on 2020-04-22.
- "62nd IMO 2021". IMO. Retrieved 2016-11-17.
- "63rd IMO 2022". IMO. Retrieved 2017-07-25.
- "64th IMO 2023". IMO. Retrieved 2018-09-08.
- "IMO 2024". IMO. Retrieved 2023-07-12.
- "65th IMO 2024". IMO. Retrieved 2022-06-11.
- "66th IMO 2025". IMO. Retrieved 2020-06-30.
- "67th IMO 2026". IMO. Retrieved 2023-06-30.
Bibliography
- Olson, Steve (2004). Count Down. Houghton Miffln. ISBN 0-618-25141-3.
- Lord, Mary (July 23, 2001). "Michael Jordans of math – U.S. Student whizzes stun the cipher world". U.S. News & World Report. 131 (3): 26.