Cracker Jack.
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A boy has a tiger, a goat, and some greens that he must take into town to be sold. To get to town he must cross a river. He cannot go around, under, or fly over the river. He must cross the river with a raft and he can only take ONE thing or animal at a time with him across. However, he cannot leave the tiger with the goat because the goat will get eaten and he cannot leave the goat with the greens as the greens will get eaten. The only two that can be left together are the tiger and the greens. The boy can make as many trips as he wishes and we assume that nothing gets eaten when the boy is with them. How does the boy get all of his cargo including himself across the river safely?
Answer