You are trying to cross a river, and you only have 1 boat. The boat can carry you and one other thing.
You need to bring:
1 wolf
1 sheep
1 giraffe
1 bale of cotton
1 bushel of apples
1 bushel of leaves
The wolf cannot be left together with either of the other animals, or it will eat them.
The sheep cannot be left together with the cotton, or it will eat it.
The giraffe cannot be left together with the leaves, or it will eat them.
How do you get across, in 11 or fewer crossings?