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Please turn off your computers… … we will solve a puzzle first ? - PowerPoint PPT Presentation


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Please turn off your computers… … we will solve a puzzle first . The Hourglass Puzzle.

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Presentation Transcript
the hourglass puzzle
The HourglassPuzzle
  • You are the King’s chef. You need to boil eggs for exactly 9 minutes, or else the King will complain, and you will lose your head!!But you have only 2 Hourglasses, one measures 7-minutes, and the other measures 4-minutes. How can you correctly measure 9 minutes??
  • Youmay not break the hourglasses!!