Good Riddles

Question: I have numbers on my face but can't find 13 any place. What am i?

Question: There once was a horse that won great fame. What do you think was the horses name.

Question: I am often known as a symbol/mark, and can be used in a trend. I am created when two paths meet, but separate at the end. What am I?

Question: What is half of 2+2?

Question: What can you see but not hear?