1890
sprinting, long-jumping, javelin, discuss and wrestling were in the Pentathlon in the Ancient Olympic games
4 days
since the first international Olympic games in 1896 :)
Badminton became an Olympic sport in 1992.
About 17 years
17 YEARS
100m long :)
7 days
In the London 2012 Olympic Games the pool is 50 m length.
swimming , hockey racing,long jump,skating
they have competed in 12 summer games and 3 winter games