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Fermi Problems. http://www.physics.umd.edu/perg/fermi/fermi.htm http://en.wikipedia.org/wiki/Fermi_problem http://www.frontiernet.net/~jlkeefer/fermipb.html http://www.vendian.org/envelope/dir0/fermi_questions.html How many piano tuners are there in the entire world?
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Fermi Problems • http://www.physics.umd.edu/perg/fermi/fermi.htm • http://en.wikipedia.org/wiki/Fermi_problem • http://www.frontiernet.net/~jlkeefer/fermipb.html • http://www.vendian.org/envelope/dir0/fermi_questions.html • How many piano tuners are there in the entire world? • "Think! Think and wonder. Wonder and think. How much water can 55 elephants drink?" -- Dr. Seuss