List of International Mathematical Olympiads

The International Mathematical Olympiad (IMO) is an annual six-problem, two-day, international high school mathematics competition. It focuses primarily on pre-collegiate mathematics, and is the oldest of the International Science Olympiads.^[1] The content ranges from precalculus to branches of mathematics such as projective and complex geometry, functional equations and well-grounded number theory. Fields such as functional analysis, calculus, field theory (and other branches of abstract algebra and topology) are generally not present on the olympiad.^[2]

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.^[3] The number of participating countries has since risen: 14 countries took part in 1969, 50 in 1989, and 104 in 2009.^[4] Since the inaugural event, the Olympiad has been held annually, with the exception of 1980.^{[n 1]} As of 2011, participating countries send teams of up to six students, plus one team leader, one deputy leader, and observers.

Awards for exceptional performance include medals for a fraction of the competitors that is as close to one-half of the participants as the judges can make it, and honorable mentions for participants who solve at least one problem perfectly.^[5] This is a list of previous IMOs, the host country of each, and the city in which the olympiads were held. It also includes the cities in which each olympiad was hosted.

Contents 1 Olympiads 2 See also 3 Notes 4 References 5 External links

Olympiads

#[4]	City/Cities	Country	Year	Date[4]	Top-ranked country[6]	Refs
1	Braşov and Bucharest	Romania	1959	June 23 – July 31	Romania	[7]
2	Sinaia	Romania	1960	July 18 – July 25	Czechoslovakia	[7]
3	Veszprém	Hungary	1961	July 6 – July 16	Hungary	[7]
4	Ceske !České Budějovice	Czechoslovakia	1962	July 7 – June 15	Hungary	[7]
5	Warsaw and Wrocław	Poland	1963	July 5 – June 13	Soviet Union	[7]
6	Moscow	Soviet Union	1964	June 30 – July 10	Soviet Union	[7]
7	East Berlin	East Germany	1965	June 13 – July 13	Soviet Union	[7]
8	Sofia	Bulgaria	1966	July 3 – July 13	Soviet Union	[7]
9	Cetinje	Yugoslavia	1967	July 7 – July 13	Soviet Union	[7]
10	Moscow	Soviet Union	1968	July 5 – July 18	East Germany	[7]
11	Bucharest	Romania	1969	July 5 – July 20	Hungary	[7]
12	Keszthely	Hungary	1970	July 8 – July 22	Hungary	[7]
13	Žilina	Czechoslovakia	1971	July 10 – July 21	Hungary	[7]
14	Toruń	Poland	1972	July 5 – July 17	Soviet Union	[7]
15	Moscow	Soviet Union	1973	July 5 – July 16	Soviet Union	[7]
16	Erfurt and East Berlin	East Germany	1974	July 4 – July 17	Soviet Union	[7]
17	Burgas and Sofia	Bulgaria	1975	July 3 – July 16	Hungary	[7]
18	Lienz	Austria	1976	July 2 – July 21	Soviet Union	[7]
19	Belgrade	Yugoslavia	1977	July 1 – July 13	United States	[7]
20	Bucharest	Romania	1978	July 3 – July 10	Romania	[7]
21	London	United Kingdom	1979	June 30 – July 9	Soviet Union	[7]
22	Washington, DC	United States	1981	July 8 – July 20	United States	[7][n 1]
23	Budapest	Hungary	1982	July 5 – July 14	West Germany	[7]
24	Paris	France	1983	July 3 – July 12	West Germany	[7]
25	Prague	Czechoslovakia	1984	June 29 – July 10	Soviet Union	[7]
26	Joutsa	Finland	1985	June 29 – July 11	Romania	[7]
27	Warsaw	Poland	1986	July 4 – July 15	Soviet Union  United States	[7]
28	Havana	Cuba	1987	July 5 – July 16	Romania	[7]
29	Sydney and Canberra	Australia	1988	July 9 – July 21	Soviet Union	[7]
30	Brunswick	West Germany	1989	July 13 – July 24	China	[7]
31	Beijing	China	1990	July 8 – July 19	China	[7]
32	Sigtuna	Sweden	1991	July 12 – July 23	Soviet Union	[7][n 2]
33	Moscow	Russia	1992	July 10 – July 21	China	[7]
34	Istanbul	Turkey	1993	July 13 – July 24	China	[7]
35	Hong Kong	Hong Kong	1994	July 8 – July 20	United States	[7][n 3]
36	Toronto	Canada	1995	July 13 – July 25	China	[9]
37	Bombay	India	1996	July 5 – July 17	Romania	[10]
38	Mar del Plata	Argentina	1997	July 18 – July 31	China	[11]
39	Taipei	Taiwan	1998	July 10 – July 21	Iran	[12]
40	Bucharest	Romania	1999	July 10 – July 22	China  Russia	[13]
41	Daejeon	South Korea	2000	July 13 – July 25	China	[14]
42	Washington, DC	United States	2001	July 1 – July 14	China	[15]
43	Glasgow	United Kingdom	2002	July 19 – July 30	China	[16]
44	Tokyo	Japan	2003	July 7 – July 19	Bulgaria	[17]
45	Athens	Greece	2004	July 6 – July 18	China	[18]
46	Mérida	Mexico	2005	July 8 – July 19	China	[19]
47	Ljubljana	Slovenia	2006	July 6 – July 18	China	[20]
48	Hanoi	Vietnam	2007	July 19 – July 31	Russia	[21]
49	Madrid	Spain	2008	July 10 – July 22	China	[22]
50	Bremen	Germany	2009	July 10 – July 22	China	[23]
51	Astana	Kazakhstan	2010	July 2 – July 14	China	[24]
52	Amsterdam	Netherlands	2011	July 13 – July 24	China	[25]

See also

• Asian Pacific Mathematics Olympiad
• Provincial Mathematical Olympiad
• List of mathematics competitions
• List of International Mathematical Olympiad exceptional participants

Notes

References

General

• Olson, Steve (2004). Count Down. Houghton Miffln. ISBN 0-618-25141-3 
• Lord, Mary (Monday, July 23, 2001). "Michael Jordans of math – U.S. Student whizzes stun the cipher world". U.S. News & World Report 131 (3): 26. http://search.ebscohost.com/login.aspx?direct=true&db=a9h&AN=4818783&site=ehost-live. 

Specific

External links

• Official IMO site
• General information on the IMO