Good Riddles

Question: What has 3 feet but cannot walk?

Question: There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Question: One (k)night, a butcher, a baker, and a candle stick maker all went into an old deserted cottage. No one left no one entered. The next day, 4 people came out. Who were they?

Question: You use me from your head to your toes,
the more I work the thinner I grow.

What am I?

Question: What is the next number in the sequence? 1 11 21 1211 111221 312211