15 15 15 15 15

Fifteen is:

  • The number of days in each of the 24 cycles of the Chinese calendar.
  • The number of guns in a gun salute to Army, Marine Corps, and Air Force Lieutenant Generals, and Navy and Coast Guard Vice Admirals.
  • The number of checkers each side has at the start of a backgammon game.
  • The 15 puzzle.
  • The number of balls in the eight ball variant of billiards
  • The number of letters in the words “uncopyrightable”, “dermatoglyphics”, “misconjugatedly”, and “hydropneumatics”, which are the longest words in the English language that do not repeat a letter.
  • The number of minutes in one quarter of an hour; 15 minutes past or before an hour is often known as quarter past and quarter to, respectively. (http://en.wikipedia.org/wiki/15_(number))
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