It is well known that mathematics underpin many practical matters, some of which, seemingly, have no relation at all.

The dimension of a linear space, in general, the number of independent factors that create the space, the video (image and sound), the ratio of differences, a basic analysis of Euclidean geometry, theory and origami constructions, the construction of magic squares, the contrast between intuitive and mathematical proofs, and the curiosities of very large numbers are topics presented in this book, each in a separate chapter.

This book is primarily aimed at readers who have some knowledge of undergraduate mathematics.

I hope that, within these pages, the interested reader will find something interesting, something that will satisfy them. Then I too can say that this effort has been successful.