A flexagon is a motion structure that has the appearance of a ring of hinged polygons. It can be flexed to display different pairs of faces, usually in cyclic o

Martin Gardner enormously expanded the field of recreational mathematics with the Mathematical Games columns he wrote for Scientific American for over 25 years

The history of mathematics is replete with examples of major breakthroughs resulting from solutions to recreational problems. The modern theory of probability a

A flexagon is a motion structure that has the appearance of a ring of hinged polygons. It can be flexed to display different pairs of faces, usually in cyclic o

This book complements available one-make books on domestic synchronous clocks. It is also a history of science book that sets British domestic synchronous clock