Importance of Twelve (12)
1.
Its etymology originates from the German
compound twalf meaning two left over.
2.
It can be portioned in 77 ways.
3.
There are twelve months in a year. They are
– January, February, March, April, May, June, July, August, September, October,
November, and December.
4.
There are 12 zodiac signs. They are – Aries
(March 21 – April 19) , Taurus ( April 20 – May 20) , Gemini (May 21 –June 20),
Cancer (June 21- July 22) , Leo ( July 23 -
August 22 ), Virgo (August 23 – September 22) , Libra (September 23 –
October 22) , Scirpio (October 23 - November 21), Sagittarius (November 22 -
December 21), Capricorn (December 22 – January 19), Aquarius (January 23 -
February 18), Pisces (February 19 – March 20)
5.
A 12 sided polygon is called a dodecagon and
a 12 faced polyhedron is called a dodecahedron. A dodecahedron is a solid with
regular pentagon on each of its 12 faces.
6.
Octahedron and Cube have 12 edges.
7.
The strength of wind is measured on the
Beaufort scale which runs from 0 to 12.
8.
On one hand you can count off the numbers
from 1 to 12 by touching the joints of your fingers with your thumb.
9.
12 is the
first abundant number. An abundant number is a number whose sum of factors
excluding itself is more than the number. 12 has the factors as 1, 2, 3, 4, 6 and
12 and the sum of 1 + 2+ 3 + 4 + 6 =16 >12.
10. It is a pentagonal number. Those numbers which
represent the shape of pentagon are called pentagonal number. In the pentagonal
numbers the lower base is a square with a triangle on the top. 1,
5,12,22,35...are its example. The nth pentagonal number Pn is given
by the formula:-
a. Pn
= n ( 3n – 1 )
2
11. It
is the smallest number with exactly 6 divisors. Its divisors are 1, 2, 3, 4, 6
and 12.
12. It
is the largest known even number expressible as the sum of two primes in one
way. 12 = 5 + 7
13. The
square of 12 is palindromic to its reverse 21.
122
= 144 212
= 441
14. It
is the first composite number of the form p2q; a square prime
combination. 12
= 22 x 3
15. It
is a sublime number. A number that
has a perfect number of divisors and the sum of its divisors is also a perfect
number. 12 has 6 divisors (1, 2, 3, 4, 6 and 12) and 6 is a perfect number.
Moreover the sum of its divisor is 28 which is also a perfect number.
16. It
is a super factorial number because it can be expressed as the product of first
three factorials.
12
= 1! x 2! x 3!
17. The
atomic number of magnesium is 12.
18. The
12th moon of Jupiter is Lysithea.
19. The
famous kissing number problem in mathematics talks about impossibility of
arranging more than 12 spheres of equal size so as to touch a central sphere.
20. There
are many mathematical terms associated with 12.
1
feet = 12 inch 1
dozen =12 articles
21. It
has a very interesting property. 1122334455667789 x 122 = 16 16
16 16 16 16 16 16 16
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