Good Riddles

Question: A farmer is trying to cross a river with a bag of corn, a hen, and a fox. The farmer's boat is only big enough to take himself and one other item per trip. The hen cannot be left alone with the corn or she will eat it. Likewise the fox cannot be left with the hen, or the hen will be eaten. How does the farmer get all three items across the river?

Question: When it's warm it has something warming it, but when it's cold it's naked. What is it?

Question: A man built his house above a river between two trees. He attaches his house to the middle of the two tree's trunks. He does this because the river rises by 2 inches each years, but the trees grow 1 inch each year. If his house is 4 inches above the river how long will it take for water to hit his house?

Question: An apple tree has apples on it. A storm comes through and there is no longer apples on the tree. But there isn't apples on the ground either.

How can this be so?

Question: When you bend me I'm kind
But I'm very hard to find
I'm easily sold
and rhyme with this when told

What am I?