Easy Riddles and Answers

Question: The King and A Butler walk into a room, they lock all the doors behind them, the room has no windows. A night passes and the next day 3 people walk out of the room, Who is the 3rd person?

Question: I have existed for centuries, but last only a month. What am I?

Question: What sound does a nut make when it sneezes?

Question: Round like a dishpan and smaller than a bathtub.But the ocean can't fill it.What is it?

Question: When you do not know what I am, then I am something. But when you know what I am, then I am nothing. What am I?