Guest comedians Tim Key and Alex Horne pit their common sense against Dara's mathematically-minded brain as they battle it out to solve puzzles and problems set by Professor Marcus du Sautoy. Today's theme is, 'How Maths Can Take You All the Way'.

Guest comedians Tim Key and Alex Horne pit their common sense against Dara's mathematically-minded brain as they battle it out to solve puzzles and problems set by Professor Marcus du Sautoy. Today's theme is, 'How Maths Can Take You All the Way'.