Three travelers need to cross a river using a boat that can hold a maximum weight of 100 kg. Traveler X weighs 100 kg, Traveler Y weighs 50 kg, and Traveler Z weighs 50 kg. How can all three cross to the other side?
First, Y and Z cross together (100 kg). Y stays on the far bank while Z rows back alone. Then X crosses alone (100 kg) and stays on the far bank while Y rows back alone. Finally, Y and Z cross together again.
Y and Z combined weigh 100 kg, allowing them to take the boat over first so one can return it, making way for X to cross alone.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Medium. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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