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