Crossing the Bridge at Night

Answer

The answer is 60 minutes, not 65 minutes! First, Joe and Torey go first (10 minutes). Joe returns with the lantern (5 minutes). Joe stays and Sarah and Mike go together (25 minutes-this is how you save time). Torey returns with the lantern to get Joe (10 minutes) and both return (another 10 minutes).

I want to give credit to Fred Paul, retired educator from the NY State Department of Education, who shared a similar problem with us when he came to visit my school many years ago.

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