What changes a pear into a pearl? What is the only thing you can break when you say its name? What is a sick man a controdiction? What book has the most stirring chapters? What is the end of everything? How many sides does a house have? What kind of dog never bite? What kind of dog doesn't bite or bark? What is the smallest room in the world? What ship has two mates but no captain? What is the most difficult key to turn? What question can never be answered by 'Yes'? What is yours, but is used more by others than by you? Why does the boy carry a ladder to the school? What is there in your house that ought to be looked into? What large instrument do you carry in your ears? Why do some old people never use glasses? What table is in the field? What do workers do in a clock factory? What two words have thousands of letters in them? When do you go as fast as a racing car? How many sides does a house have? What falls often but never gets hurt? What person tried to make you smile most of the time? What can hear you without ears and can answer you without a mouth? Where can you always find money? What month do soldiers hate? What can you swallow that can also swallow you? Why is an empty purse always the same? What's too much for one, just right for two, but nothing at all for three?