Scientific American Mathematical Games Knowledge Cards
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The sharpest puzzle purveyor working in the English language, the great Martin Gardner wrote his Mathematical Games column for Scientific American
in 1956. The forty-eight diabolical Gardner puzzles collected in this deck have rewardingly offbeat setups, featuring learned professors who gallop up down-moving escalators, rose-red cities as old as time itself, and the walking habits of Immanuel Kant. The run really comes in, however, with the demands they make on the would-be solver's powers of reason and the exquisite simplicity of their eventual answers.