Good Riddles

Question: A computer walks up to two stores, one called '1', and one called '0'. Which does it choose?

Question: Which is correct, 9 and 5 is 13 or 9 plus 5 is 13?

Question: I was the first and now I am the one.

What am I?

Question: What takes you up and brings you down but never moves?

Question: What is in the valley of the glass doors. Listen to the words the houses have no roofs or doors, it just has walls. So what's in the valley of the glass doors?