A lot
42
896 gymnasts participated in the 2008 Summer Olympics.
The 2008 Summer Olympics were held in Beijing, China.
Ethiopia first participated in the Summer Olympics in 1956 and has been to every Summer Olympics, except the 1976 Summer Olympics, since then.
Belgium has participated in both Olympics i got my answer from wikipedia
44 countries participated in the 1924 Summer Olympics. 16 countries participated in the 1924 Winter Olympics.
Grant Hackett has participated in three Olympics, the 2000 Summer Games in Sydney, 2004 Summer Games in Athens, and 2008 Summer Games in Beijing. He has won 7 medals (3 gold, 3 silver, 1 bronze).
The 2008 Beijing Olympics was the 29th Summer Olympic Games.
Jamaica first participated in the Summer Olympics in 1948 and has participated in every Summer Olympics since then.
A total of 959 athletes from 70 countries participated in the 1980 Summer Olympics.
The Summer 2000 Games were held in Sydney, Australia.