240
104 athletes are competing in the Olympics games for Brazil 2012
204
205
Nauru
16
Yes, Russia are competing in the 2012 Summer Olympics in London.
over 500
Shot put
none
Wikipedia lists Italy as having 284 athletes competing in the 2012 Summer Olympic Games
more than 10,000 athletes
Wikipedia lists Brazil as having 259 athletes competing in the 2012 Summer Olympic Games