Good Riddles

Question: There are two boys at an international math contest in December 2013; one is British and one is American. They both write their names, the date, and their answers on the paper. The only problem is that they both have the same name and the papers cannot be told apart.

What is the date?

Question: My eye is dark,
and my mane is yellow.
You man see me at the mart,
and I'm probably taller than you fellow.

What am I?

Question: How can forty elephants have forty-fore heads?

Question: Most people are born on one, die on one, and experience some of their most blissful moments upon it.

Question: What's higher than mountains, Smaller than trees?