Board Thread:Fun and Games/@comment-48285-20141103191822/@comment-25267670-20151019080010

DinoTaur wrote: Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. 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. The question is, can they all get across the bridge in 15 minutes or less? A and B go first, A come back to deliver the torch, then C and D go, B come back with the torch, then A and B cross the river. It only takes 15 minutes.