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#3. Four people arrive at a narrow bridge that can only hold two people at a time. It’s nighttime and they have one torch that has to be used during the crossing. Person A can cross the bridge in one minute, B in two minutes, C in five minutes, and D in eight minutes. When two people cross the bridge together, they must move at the slower person’s pace. Can they all get across the bridge in 15 minutes or less?
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