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Mathematics, 31.01.2020 00:50 ashleyvalles16

Four friends are out for a walk at night and come to an old bridge. it isn’t safe to cross the bridge without a flashlight, and only two people can cross at a time. they only have one flashlight. if the same person carries the flashlight the entire time, what is the minimum number of times that person will have to cross the bridge in order for the entire group to get to the other side?

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