POTW1 - one flashlight between them to cross safely the...

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MATH 135 Fall 2005 POTW #1 - Due Monday 26 September 2005 Four wounded Mathies have to cross the MC-DC bridge at night to es- cape from their rabid Classical Algebra prof. The bridge is damaged, and so can only take two Mathies at a time. When two Mathies cross together, they have to travel at the speed of the slowest. The four Mathies have only
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Unformatted text preview: one flashlight between them: to cross safely, the flashlight has to go across each time. If the four Mathies individually take 1, 2, 4, and 6 minutes to cross the bridge, what is the shortest time needed for all four to cross safely? (Hint: The answer is NOT 14 minutes.)...
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