- The number 13 is considered a “happy number.” (Bet you didn’t know that.) Happy numbers are defined by a process of replacing each digit with its square and adding them up. Rinse and repeat until you get to the number “1”.
- “Eleven plus two” is an anagram of “twelve plus one”. That is just plain freaky cool.
- In Italy, 13 is a very lucky number. The phrase “fare tredici” (literally “to do 13”) means (figuratively) that you hit the jackpot. Well, duh. Because if you’re in Italy, that’s pretty wonderful.
- There are 13 items in a baker’s dozen. (You knew that.)
- But I bet you didn’t know that 13 is the smallest emirp. Did you even know we had emirps? An emirp (I did not make this up) is a prime number that becomes a different prime number when its digits are reversed.
- M is the 13th letter of the alphabet and exceptionally good for applying to Aunties and chocolate.
- District 13 wasn’t wiped out as so many people believed. (Extra points for getting the reference.)
- In rugby league, each side has 13 players on the field. (This does not apply if they’re playing sevens.)
- There are 13 notes (inclusive) in a full chromatic musical octave (this will also not be on the test).
- The number 13 has been good luck for many athletes including Wilt Chamberlain (basketball), Alex Rodriguez (baseball), and Pavel Datsyuk (hockey).
- The number 13 is an important motif in American heraldry (what? We have heraldry? When did that happen?). There were 13 original colonies,
- there are 13 stripes on the American flag, and
- the Great Seal of the United Sates has 13 stars on it.
Don’t you feel better knowing all that?
District 13 in The Hunger Games. But you knew that.