Sixteen countries shall participate in the UEFA Euro 2016 tournament.
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216 countries will participate in 2012 Olympics.....
4,000,000 atletes and 4,000 countries will participate
27 countries and 74 athletes participate in the Modern Pentathlon.
The Euro is the same in all countries, there is only one Euro.
As of the 1st of January 2014, 18 of the European Union's 28 countries use the euro.
71 Countries will participate in the 19th commonwealth games.
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76
16 countries. See Wikipedia under Euro.
in the finals 32 countries competed
204 countries