Is this Premier League striker a secret maths genius?

Chelsea striker Liam Delap has recently stunned fans on Instagram by apparently doing incredibly complicated calculations in his head, finding what’s known as the cube root of some very large numbers.

But is he really a human calculator? Or is there something else going on? Tim Harford speaks to Rob Eastaway, mathematician and author of ‘Maths on the Back of an Envelope’ to learn about the trick you can use to pull this off - and while he’s here we also ask him about the trend of more goals being scored in the Premier League.

Presenter: Tim Harford
Producers: Nathan Gower
Series Producer: Tom Colls
Editor: Richard Vadon
Programme Coordinator: Brenda Brown
Sound Engineer: James Beard
Credit: Video of Liam Delap from Chelsea’s Instagram account, chelseafc