Dara O Briain: School Of Hard Sums

Dara O'Briain continues on his journey into the realms of pure logic. Once again he's helped by Oxford University maths professor Marcus du Sautoy and is joined by comedy guest Alex Horne.

This week, the team uses maths, physics, chemistry, logic and all those hidden mechanics of the world we don't see to solve problems that have the theme of 'location, location, maths'.

So... there are three houses and three utilities, and the team must draw a line from each house to each utility without crossing the lines.

Then there's the question of how do you connect four cowsheds in each corner of a field that need to be connected without laying paths?

If that wasn't enough, they're faced with a toughie - a student has been on a serious night out on the town and has found that his 13 mates have stolen his 13 items of clothing. They're split across five different locations, so where's the best meeting place that keeps the combined distance travelled by all his mates to an absolute minimum?