Professor Stewart’s Cabinet of Mathematical Curiosities

Ian Stewart compiles a disorganized scrapbook of logic puzzles, number theory tidbits, and geometric oddities collected over several decades. The text moves rapidly between disparate topics, covering the mechanics of the Enigma machine, the properties of Mersenne primes, and the mathematical impossibility of folding a piece of paper more than seven times. Stewart presents specific challenges such as the "Knight's Tour" on a chessboard and the Bridges of Königsberg problem, alongside brief biographies of figures like Srinivasa Ramanujan. Each entry functions as a self-contained mental exercise or a short explanatory note on mathematical phenomena.

This collection targets hobbyists and students who enjoy recreational mathematics and deductive reasoning. Readers use the book to test their problem-solving skills against classical paradoxes and topographic riddles. By engaging with these entries, the reader gains a broader vocabulary of numerical patterns and a practical understanding of how abstract logic applies to physical shapes and games. It serves as a source for parlor tricks, mental shortcuts, and a deeper familiarity with the historical development of mathematical thought.