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Quantum CyberTeaser: July/August 1997


Pedestrian banker. Mr. R. A. Scall, president of the Pyramid Bank, lives in a suburb rather far from his office. Every weekday a car from the bank comes to his house, always at the same time, so that he arrives at work precisely when the bank opens. One morning his driver called very early to tell him he would probably be late because of mechanical problems. So Mr. Scall left home one hour early and started walking to his office. The driver managed to fix the car quickly, however, and left the garage on time. He met the banker on the road and brought him to the bank. They arrived 20 minutes earlier than usual. How much time did Mr. Scall walk? (The car’s speed is constant, and the time needed to turn around is zero.)
[I. Sharygin]


The winners:

  • Jaak Sarv (Talinn, Estonia)
  • Xi-An Li (Middlebury, Vermont)
  • Leo Borovskiy (Brooklyn, New York)
  • Pasquale Nardone (Brussels, Belgium)
  • Johann Visser (Rotterdam, The Netherlands)
  • Pelle Hamberg (Lidingoe, Sweden)
  • Brian Platt (Woods Cross, Utah)
  • Keith Frikken (Dakota, Minnesota)
  • Oleg Shpyrko (Cambridge, Massachusetts)
  • Howard Brown (Idaho Falls, Idaho)
  • Bob Cordwell (Albuquerque, New Mexico)
  • How Yu Khong (Kuala Lumpur, Malaysia)
  • Grant Anderson (Portland, Oregon)

[Note: there were 13 winners this time due to a mix-up in the cyberjudging process.]

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