They know something you don't know. They work inside investment Banks, betting companies and social media giants. What are the secrets held by mathematicians and what can everyone else learn from them? Their advantage can be reduced to a small number of equations. Ten of them. And, surprisingly, it isn't their technical details that give them an edge. It is the way these equations allow them to view problems from a different angle -- a way of seeing the world that anyone can learn. In this eye-opening book, mathematician David sumpter reveals the formulas that make the modern world go round, and how we can use them to better our chances of success, solidify friendships and live healthier lives, to guard against failure and financial ruin, and to see through scaremongering. Writing with clarity and wit, sumpter explains how the same equations that are integral to face book can help you to work out how long to persist with a difficult task or how many episodes of a new Netflix series to watch before giving up. Empowering and enlightening, the ten equations shows how Maths can truly change our way of understanding the world.