Good Riddles

Question: The sky is blue, the sea is green. The answer never ends in-between.

Question: I cannot speak but i tell everything.Im not a tree but i have a leaves. I have hinges but neither not a door nor a window. Who am i?

Question: 1 man walks in to a bar another man walks into a bar the third man ducks. Why did the third man bring a duck?

Question: I am both black and white. I go with the flow and my loyalty never wavers.

Question: Imagine that you're in a dark room where there is nothing except a drinking cup. There is a door out of the room but it is locked with 50 locks on the outside. There are guards pointing guns at the door so if you try to escape you will die. How do you get out of the room?