Adults use mathematics extensively in work even though they may deny it or dismiss their numerate behaviour as common sense. Their capacity for mathematics is invisible to them and confirms their ‘non-maths person’ self-perception, which has negative consequences for their life choices. In Adults, Mathematics and Work, the authors tackle and explain a number of paradoxes related to the curious relationship between adults and mathematics. It operationalises the benefits of workplace doctoral research by providing a set of the tools to review this mistaken self-perception in order to make workers’ abilities available for development. It also provides a systematic way of uncovering and recognising informal and non-formal learning to support employability and re-employability in an increasingly fluid work-landscape.