First in series. Michael Rosen and Dr Laura Wright explore the numbers one to ten and look at how we understand - and misunderstand - the language of numbers. Why is a shampoo called Zinc 24 so much more appealing than a shampoo called Zinc 31? How do we cope with offers in supermarkets? Alex Bellos and Michael Blastland explain.

Producer Beth O'DeaAlex Bellos is the author of Alex Through the Looking-Glass: How Life Reflects Numbers and Numbers Reflect Life.