Answer:
When does 4 - 1 = 5 ?
Which bank is not used for storing money?
What goes up the hill and down the hill, And spite of all, yet stand still?
An archaeologist unearths a coin bearing the inscription "57BC". How does he instantly know that it's a forgery?
A truck driver is going opposite traffic on a one-way street. A police officer sees him but doesnโt stop him. Why didnโt the police officer stop him?
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?