Why do some puzzles make us immediately leap to the wrong conclusion?
That?s the subject of Alex Bellos? new book Think Twice, which has page after page of questions designed to deceive.
Alex sets Tim Harford some of his favourite puzzles.
Presenter: Tim Harford
Series producer: Tom Colls
Production co-ordinator: Katie Morrison and Janet Staples
Sound mix: Donald MacDonald
Editor: Richard Vadon
