Best short riddles

cleanlogic

Billy was born on December 28th, yet his birthday is always in the summer. How is this possible?
Billy lives in the Southern Hemisphere.
61.54 %
201 votes
logicwhat am I

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?
The letter 'X'. It is the 24th letter of the alphabet, XX in Roman numerals is 20, and XXX is a label for movies that are very inappropriate (unclean).
61.35 %
186 votes