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Quantum CyberTeaser: May/June 1999


B264

Game show gambit. A participant in a game show is offered a choice of one of three boxes, only one of which contains a prize. After the participant chooses a box, the emcee opens one of the other two boxes and shows that it is empty. Then the emcee asks: "Do you want to stick with your choice, or would you rather pick the other box?" Naturally one wants to maximize the odds, but will switching do it? What would you do? Make your decision - and justify your answer!

Solution

Stick or switch?

The winners:

  • Bruno Konder (Rio de Janeiro, Brazil)
  • Theo Koupelis (Wausau, Wisconsin)
  • Anastasia Nikitina (Pasadena, California)
  • Jerold Lewandowski (Troy, New York)
  • John E. Beam (Bellaire, Texas)
  • Xi-An Li (Middlebury, Vermont)
  • Christopher Franck (Redondo Beach, California)
  • Hana Bizek (Argonne, Illinois)
  • Liubo Borissov (New York, New York)
  • Joshua Zucker (Mountain View, Calfornia)

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