Canada will send 277 athletes in 24 sports. Canada did not send a team in handball or field hockey.
2012 Summer Olympics: Canada = 281 (per London2012.com)
Sweden competed at the 2012 Summer Olympics in London with 134 athletes in 20 sports
At the 2012 Summer Olympics in London the Philippine's is represented by 11 athletes who are competing in 8 sports, making it the smallest Philippine delegation to the Summer Olympics since 1936.
Athletes from over 200 different countries will be participating in the 2012 summer Olympics
Argentina had 138 athletes in 22 sports at the Summer Olympics
Wikipedia list India as having 81 athletes competing in the 2012 summer Olympics
Ireland is competing at the 2012 Summer Olympics in London, United Kingdom with 66 athletes in 14 sports
Canada had 277 athletes
USA with 530 athletes is second to Great Britain's 541 athletes on having the most athletes at the 2012 Summer Olympics
104 athletes are competing in the Olympics games for Brazil 2012
Poland typically has many athletes at the Summer Olympics. In the most recent Olympics (2012), Poland sent 218 athletes and won a total of 10 medals.
Jamaica competed at the 2012 Summer Olympics with 50 athletes in 4 sports
Yes. Vietnam is competing at the 2012 Summer Olympics in London and has 18 athletes competing in 11 sports
The 2012 Summer Olympics in London had a total of 10,820 athletes representing 204 nations.
Canada sent 277 athletes in 24 sports
There is no 2010 Summer Olympics. The Olympics in 2010 was a Winter Olympics that took place in Vancouver, BC, Canada. The next summer Olympics after the 2010 Winter Olympics is the 2012 Summer Olympics in London.
There are over 10,000 athletes competing in the 2012 Olympics. I have not even found a link that lists them in a single location under individual names. See related link