A farmer needs to cross a river with a wolf, a goat, and a cabbage. The boat can only hold the farmer and one item at a time. If left unattended, the wolf will eat the goat, and the goat will eat the cabbage. How many one-way boat trips does the farmer need to make to transport everything safely across?
7 trips
Trip 1: Take goat across, leave wolf and cabbage. Trip 2: Return alone. Trip 3: Take wolf across, bring goat back. Trip 4: Take cabbage across, leave goat. Trip 5: Return alone. Trip 6: Take goat across. Trip 7: Return to pick up nobody, wait, trip 6 finishes the job. Total one-way legs: 4 forward, 3 backward, equaling 7 total trips.
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: Easy. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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