Short Riddles and Answers

Question: I have a neck but no head, 2 arms but no hands, I go with you to school, I go with you to work. What Am I?

Question: I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?

Question: You are in a brick cube. Now way in and no way out. There is only a table and a mirror. How do you get out?

Question: When the answer I give is yes, it is no, and when the answer I give is no, it is yes. What is the question?

Question: What word begins with letter H, but add it with W and it becomes another word yet pronounced just the same?