Good Riddles

Question: Fifty is my first, my second is the third in fourth, and my end is the end of an ending. With a nut I become a nut that isn't, and without one I move.

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.