Everyday Life is Full of Math

Mathematics can turn up in unexpected places: in the shape of a donut, the layout of a toy train track, or the strategy behind a rock-paper-scissors tournament. In Everyday Life is Full of Math, Jun Mitani invites readers to look again at ordinary things and discover the ideas hiding in their patterns, shapes, and rules. The explorations are designed for general readers familiar with middle- or high-school mathematics, with an emphasis on intuitive understanding rather than advanced formulas.

33 small discoveries in numbers and shapes

The first section moves through mathematical curiosities drawn from familiar games and everyday observations. Its topics include tournament strategy, magic squares, the Collatz conjecture, conic sections made by light, and the changing perspective on a crescent moon. Rather than following a single storyline, the chapters offer individual encounters with mathematics from different corners of life.

Mathematics you can make and play with

The second section brings mathematical thinking into hands-on activities and crafted forms. Readers encounter toy train layouts, the Tower of Hanoi, paper folding, modular origami, pop-up figures, and other shapes made or explored through simple materials. These examples show how building, folding, and observing can reveal relationships that might otherwise stay hidden.

A distinctly everyday view

Many of the book’s examples come from Mitani’s observations of daily life in Japan. Alongside the mathematical ideas, that perspective gives the collection a specific sense of place and introduces readers to details they may not encounter in their own routines.

For curious readers, not specialists

This recreational mathematics book is suited to readers who enjoy puzzles, geometry, origami, or finding patterns in ordinary surroundings. Its varied topics can be explored one at a time, making it easy to follow a particular interest—or simply open a chapter and see what catches the eye. QR codes also point to puzzle apps developed by the author.