Most of my students ask me at some point, and this where will it serve me? Especially when we see more abstract mathematical ideas for them, such as the calculation of roots of a polynomial. Someone even made a joke by saying "no way I go to the store and tell the lady to sell me of rice". It must be said that, in large part, this lack of connection of mathematics with the reality of the common person (this does not happen with those who study the career of mathematics) is due to some extent to a bad design in the plans and programs of study from the basic level, to the upper level, where preference is given to the teaching of algorithms instead of showing the beauty of mathematics that occurs through thought. So, the main objective of this text, is to bring the ordinary person to the math and show that, in fact, is presented everywhere (literally), that wherever you go or whatever you do, all is related to mathematics. It would not be bad for the reader to do the exercise of imagining what his life would be like without mathematics, because, for example, this would affect the transportation system, the communications system, the Internet would not exist without mathematics. Throughout the book we will see a variety of examples in everyday life where mathematics is used. I do not have the biggest doubt that the reader will be surprised at the many uses of mathematics that he learns in school. Obviously, a book is not enough to show how mathematics is everywhere, in everything we do, even in the way we think, but it is a little introduction and maybe, in the future, we can write a second part with more examples, as beautiful as the ones I show here.