31 (number) - in Other Fields

In Other Fields

Thirty-one is also:

• The number of musical triads (12 major, 12 minor, 4 diminished, and 3 augmented). (See triad (music).)
• The number of days in the months January, March, May, July, August, October and December
• The code for international direct-dial phone calls to the Netherlands
• A card game (see Thirty-one (game))
• A type of game played on a backgammon board
• The number of flavors of Baskin-Robbins ice cream and the shops are called 31 Ice Cream in Japan
• ISO 31 is the ISO's standard for quantities and units
• In the title of the anime Ulysses 31
• In the title of Nick Hornby's book 31 Songs
• Turkish slang for male masturbation ("otuzbir")
• A women's honorary at The University of Alabama (XXXI)
• The number of the French department Haute-Garonne
• In music, 31-tone equal temperament is a historically significant tuning system (31 equal temperament), first theorized by Christian Huygens and promulgated in the 20th century by Adriaan Fokker