Do you need reasons to learn math? Have you ever felt a little Pythagoras inside you who does not dare to go on stage? In this book you will find 28 reasons to enter a wonderful world, full of art, perfection and science. 28 is a perfect number, of the few that we know, and 28 are the ideas that are imperfectly illustrated and illustrated in this book. Because reality is NOT perfect. Your work is NOT perfect. Your partner (make sure you are not reading this) is NOT perfect. Mathematics IS. This book is a journey through the great mathematical ideas of history, covering all areas. A part of a whole that will help you understand the evolution of human thought. We start counting numbers with the fingers of our hands, and now we count the thumbs we have on Facebook.