Answer:
A man is able to contact his long lost brother who has never met. They agree to meet. When the brother arrives he is able to instantly pick him out from the crowd. How is that possible?
What can fill an entire room without taking up any space?
What can you stick between a 3 and a 4 so that the result is more than three but less than four?
What is the difference between yesterday and tomorrow?
In 1990, a person is 15 years old. In 1995 that same person is 10 years old. How is this possible?
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?