Logic Riddles

Question: There are three men in a room with 62 Bicycles. two men are mad at the other man. Why?

Question: Swallowing one is fine.
Swallowing two together is fine.
But Swallow them separately and all shall fall.

What are they?

Question: What is yours, but only others can use it?

Question: Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?

Question: There was once three trees. The first tree did whatever the third tree did, and the third tree did what ever the second one does. What happens if tree number two gets cut down?