11 goes into 99 exactly 9 times, so fractions with 11 in the denominator have two digit repeating sequences in their decimal expansions. Multiples of eleven by one-digit numbers all have double digits: 00 (=0), 11, 22, 33, 44 . . .
An eleven-sided polygon is a hendecagon.
Being only one hour before 12:00 -- midnight -- the eleventh hour means the last possible moment to take care of something, and often implies a situation of urgent danger or emergency (see Nuclear Clock).
Eleven is also
- The atomic number of sodium.
- The number of guns in a gun salute to U.S. Army, Air Force and Marine Corps Brigadier Generals, and to Navy and Coast Guard Rear Admirals Lower Half.
- The number of General Orders for Sentries in the Marine Corps.
- A page in the Service Record Book of an enlisted Marine for writing down disciplinary actions.
See also: nine, ten, eleven, twelve, thirteen, integer, list of numbers.
This article is about the number. For the year AD 11, see 11.