Like solving word problems? This one requires a bit of critical thinking. If you get stuck, you can consult the Wikipedia page on the "Fox, Goose, and Beans" puzzle — but you should try to solve it on your own before peeking at the answer.
Here's the puzzle:
A farmer on his way home from the market was carrying his three purchases: a fox, a goose, and a sack of corn. The farmer came to the bank of a river and rented a boat to cross, but the boat only had enough room to carry the farmer and one of his purchases at a time.
However, if they were left alone, the fox would eat the goose, and the goose would eat the corn.
How did the farmer use the boat to get across the river with everything he purchased intact?