Put your knowledge to the test with our Olympic Quiz - 15 questions that will stretch even the most devoted sports fan.

For more great London 2012 trivia, check out our sport-by-sport guide to the Games to find out which sport is the most played on the planet, which nation first won taekwondo gold, why archery 'disappeared' for 52 years, what cycling's 'Omnium' is, and plenty more.