Answer:
Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
A man was sitting on his couch and searching for the English Channel. How did he find it?
What goes up and never comes down?
What is the building that you leave without ever having entered.
You draw a line. Without touching it, how do you make the line longer?
What is full of holes but still holds water