Stories by Martin Gardner

The combinatorial basis of the “I Ching,” the Chinese book of divination and wisdom

On expressing integers as the sum of cubes and other unsolved number-theory problems

Fantastic patterns traced by programmed "worms"

"Look-see" diagrams that offer visual proof of complex algebraic formulas

Problems on the surface of a sphere offer an entertaining introduction to point sets

An astounding self-test of clairvoyance by Dr. Matrix

Free will revisited, with a mind-bending prediction paradox by William Newcomb

Plotting the crossing number of graphs, and answers to last month's miscellany

A new miscellany of problems, and encores for Race Track, Sim, Chomp and elevators

How to turn a chessboard into a computer and to calculate with negabinary numbers

The calculating rods of John Napier, the eccentric father of the logarithm

Up-and-down elevator games and Piet Rein's mechanical puzzles

Sim, Chomp and Race Track: new games for the intellect (and not for Lady Luck)

Knotty problems with a two-hole torus,and solutions for last month's ciphers

On the practical uses and bizarre abuses of Sir Francis Bacon's biliteral cipher

Why the long arm of coincidence is usually not as long as it seems

Pleasurable problems with polycubes, and the winning strategy for Slither

The curious properties of the Gray code and how it can be used to solve puzzles

Amazing mathematical card tricks that do not require prestidigitation

A miscellany of transcendental problems: simple to state but not at all easy to solve

Challenging chess tasks for puzzle buffs and answers to the recreational problems

A topological problem with a fresh twist, and eight other new recreational puzzles

The graceful graphs of Solomon Golomb, or how to number a graph parsimoniously

Dr. Matrix poses some heteroliteral puzzles while peddling perpetual motion in Houston