Скачать или смотреть 4 people cross bridge puzzle | bridge crossing puzzle |The Bridge Riddle | Midnight Train Puzzle

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In a midnight, Rohit and his family need to cross a narrow bridge to catch the train. The bridge can hold a maximum of two persons at a time. Its very dark and they must carry the torch while crossing the bridge.
They have just 17 minutes to cross it.
Rohit can cross it in 1 minute, his sister takes 2 minutes to cross, his father takes 5 minutes and grandfather takes 10 minutes to cross the bridge.
Puzzle: What should be their strategy to cross the bridge in 17 minutes.
Note: While two persons cross at a time, the faster person must match the speed of a slower person, due to the dependency on the torch.

The video has a complete explanation of the answer.

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