A lot of international mathematical competitions are held around the world every year. The most prestigious of these is certainly the International Mathematical Olympiad (IMO), where a record number of 107 participating countries is expected this year. Beside it, there are also many regional competitions. One of these was the Austrian-Polish Mathematical Competition (APMC), which was held from 1978 to 2006.
In 2007, instead of the thirtieth Austrian-Polish Mathematics Competition, Austria was the host of the first Middle European Mathematical Olympiad (MEMO). The countries that participated in the first MEMO were Austria, Croatia, Czech Republic, Poland, Slovakia, Slovenia and Switzerland. Hungary and Germany joined them next year, and Lithuania started participating in 2009. Since then, MEMO has ten participants.