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Quantum CyberTeaser: November/December 1999

B276 Returnable bottles. A government program allows people to collect empty milk bottles and exchange them for bottles full of milk. Four empty bottles may be exchanged for one full bottle. How many bottles of milk can a family drink if it has collected 24 empty bottles? Solution

The winners:

• Christian Grothaus (Bielefeld, Germany)
• Steven Buczkoski (Malden, Massachusetts)
• Bruno Konder (Rio de Janeiro, Brazil)
• Jorge G. Moya (Culiacan, Mexico)
• Michael Marfil (Quezon City, Philippines)
• Yiming Yao (New Westminster, British Columbia)
• Nick Fonarov (Staten Island, New York)
• Igor Astapov (Kingston, Ontario)
• Jerold Lewandowski (Troy, New York)
• Roli Bihani (Sirsa, Haryana, India)

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