Answer:
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time 200 years. Why did he go downstairs?
What can I not be tomorrow?
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?
How do you make the number one disappear by adding to it?
What is the building that you leave without ever having entered.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around