Puzzle description: There is 4 people and they have to cross a bridge. Person 1 takes 1 min to cross the bridge, Person 2 takes 2 min, Person 3 takes 5 min and person 4 takes 10 min to cross the bridge. They have 1 flashlight and need to cross a bridge in the minimum amount of time. at a time max two persons can move on the bridge?
Puzzle Solution:
Person 1 + Person 2 cross the bridge = 2 min
Person 1 returns = 1 min
person 3 + person 4 cross the bridge = 10 min
person 2 returns = 2 min
person 1 + person 2 cross the bridge = 2 min
Total Time taken = 2 + 1 + 10 + 2 + 2 = 17 min
Picture Source: goo.gl/WHApi
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