# Teaching Your Children About the Number 11

The number 11 is the natural number following ten and preceding twelve. It is the smallest positive integer that requires only two syllables, and the smallest two-digit prime number. It is also the fourth number to be the same upside-down after the numbers 0, 1, and eight. There are numerous ways to teach your children about the value of 11 in everyday life. Ask your child to observe things in their surroundings, and then ask them to note if the number repeats.

The number 11 is one of the smallest positive integers. In math, it is the first repdigit. As a natural number, it is the first positive integer without a T. In music, the eleventh chord contains every note in the diatonic scale. In Spinal Tap, eleven amplifiers are present in the movie. However, it is not the only two-digit number that lacks the letter T. It has been the subject of many a popular joke and has become a cultural icon.

The stylized maple leaf on the Flag of Canada has eleven points, and the loonie is an 11-sided polygon. In math, the number represents a particular hour, and the sector code for the Agriculture, Forestry, Fishing, and Hunting industry is 11. The number also refers to an event, such as the landing of the first manned spacecraft on the moon, Apollo 11. In astronomy, the magnitude of the Messier objectM11 (M11) in the constellation Scutum, also known as the Wild Duck Cluster, is the approximate periodicity of the sun’s spots.