| Argentina | | | 2 items |
| Asia_Pacific_Mathematics_Olympiad_APMO | | | 1 items |
| Austria | | | 1 items |
| Balkan_Mathematical_Olympiad | | | 1 items |
| Baltic_Way | | | 2 items |
| Belarus | | | 2 items |
| Benelux_Mathematical_Olympiad | | | 1 items |
| Brazil | | | 3 items |
| Bulgaria | | | 2 items |
| Canada | | | 1 items |
| China | | | 2 items |
| Croatia | | | 2 items |
| Czech-Polish-Slovak_Mathematical_Match | | | 1 items |
| Czech_Republic | | | 1 items |
| Estonia | | | 2 items |
| European_Girls'_Mathematical_Olympiad_EGMO | | | 1 items |
| France | | | 2 items |
| Germany | | | 1 items |
| Greece | | | 1 items |
| Hong_Kong | | | 1 items |
| IMO | | | 1 items |
| Ibero-American_Mathematical_Olympiad | | | 1 items |
| India | | | 1 items |
| Iran | | | 1 items |
| Ireland | | | 1 items |
| Italy | | | 2 items |
| JBMO | | | 1 items |
| Japan | | | 1 items |
| Mexico | | | 1 items |
| Middle_European_Mathematical_Olympiad_MEMO | | | 1 items |
| Moldova | | | 1 items |
| Mongolia | | | 2 items |
| Netherlands | | | 2 items |
| New_Zealand | | | 1 items |
| Nordic_Mathematical_Olympiad | | | 1 items |
| North_Macedonia | | | 1 items |
| Philippines | | | 2 items |
| Portuguese_Language_Countries_Olympiad_OMCPLP | | | 1 items |
| Romania | | | 4 items |
| Romanian_Master_of_Mathematics_RMM | | | 1 items |
| Russia | | | 1 items |
| Saudi_Arabia | | | 2 items |
| Serbia | | | 1 items |
| Silk_Road_Mathematics_Competition | | | 1 items |
| Singapore | | | 1 items |
| Slovenia | | | 2 items |
| South_Africa | | | 1 items |
| South_Korea | | | 1 items |
| Soviet_Union | | | 2 items |
| Spain | | | 2 items |
| Switzerland | | | 1 items |
| Taiwan | | | 2 items |
| Thailand | | | 1 items |
| Turkey | | | 1 items |
| Ukraine | | | 2 items |
| United_States | | | 10 items |
| Vietnam | | | 1 items |
| Zhautykov_Olympiad | | | 1 items |
| all | | | 56 items |
