Mathematical Magic Show: More Puzzles, Games, Diversions, Illusions & Other Mathematical Sleight-of-mind from Scientific AmericanHow do you move two matches - and only two - to new positions, so that the glass is reformed in a different position, with the cherry outside? |
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3-space acrostic amicable answer binary called cards CHAPTER chess chessboard closed tour color combinatorial cook's tour corner counting cross-lights crossword cube decimal deck dice digital root digits discovered divisors double acrostic dragon curve equal exist face factorials five formula four game theory Golomb graph h edges half-decade half-twists hand heptomino hexagon hexomino hole integers knight's tour knights known lower fingers Mathematical mathematician Mersenne primes Möbius band Möbius strip multiple null set number of different number of moves octomino odd number order-2 pairs particles pattern payoff pentominoes perfect number perimeter permutations pieces placed play polygons polyomino possible probability problem proof proved puzzle random reader rectangle Scientific American second player shown in Figure shows side soldier Solomon W solution solvable space square strategy symbols tetraboloes tetromino tion topological tree triangles turn universe words wrote zero