University Challenge quiz: 10 of the toughest questions from the BBC show

Nate Clip - What is the most populous city in the world?...

'Despairing' Amol Rajan throws his head in his hands as University Challenge makes 'staggering and deeply disturbing' blunder - but would you make the same mistake?

University Challenge contestants' extremely expressive reactions

Amol Rajan stars as the new host of BBC's University Challenge

University Challenge contestant nails hardest ever question