Answer:
What is the building that you leave without ever having entered.
A man wants to buy a used car. He finds a beautiful Buick for $9500, but he buys it without paying a dime. How did he manage this?
How many bananas can you eat if your stomach is empty?
What can you stick between a 3 and a 4 so that the result is more than three but less than four?
What is yours but only used by others?
It is something you will never see again.
Logic
Animal
Difficult
Easy
Food
Funny
Kids
What am I?