## Friday, June 5, 2015

### Special properties of number associated with Today’s Date

Dear All,
I have been collecting information from various resources regarding the special properties being associated with today's date.
It's already 5th June today. So, today I will share properties from the dates (numbers) 1 to 5.
In future I would prefer to post day wise.
In case you also wish to share something interesting kindly do it.
Any suggestions are also welcome.
Amit Bajaj

Special properties of number 5 (Today’s Date)

### 5. 5is a Pentagonal Number.

6. The Chemical Element Boron has an atomic number of 5.
7. The five natural senses of sight, hearing, smell, taste, and touch.

8. The 5 Elements: Fire, air, water and Earth and Spirit.

Special properties of number 4 (Today’s Date)
1.  Four is the smallest composite number, its proper divisors being 1 and 2.
2. 4 is the smallest number of colors sufficient to color all planar maps.
3.  4 is a palindromic number in decimal system.
4. The word 'four' has 4 letters and is the smallest honest number. Honest numbers are numbers n that can be described using exactly n letters in standard mathematical English.
5. A 4 x 4 square has an area equal to its perimeter.
6. The atomic number of beryllium.
7. Using four 4's and any operations, try to write equations that have the integers from 1 to 100 as the answer (see example below):
1 = 44/44
2 = 4/4 + 4/4
3 = (4 + 4 + 4)/4
4 = 4(4 - 4) + 4, etc...
8. In Puruṣārtha, there are four aims of human life: Dharma, Artha, Kāma, Moksha.
9. The four stages of life Brahmacharya (student life), Grihastha (household life), Vanaprastha (retired life) and Sannyasa (renunciation).
10. Four seasons: spring, summer, autumn, winter
11. Four cardinal directions: north, south, east, west.
12. Four suits of playing cards: hearts, diamonds, clubs, spades.
13. There are four basic states of matter: solid, liquid, gas, and plasma.

Special properties of number 3 (Today’s Date)
1. 3 is a Fibonacci number
2. 3 is a triangular number3 is a palindromic number in decimal system
3. 3 is a palindromic number in binary system (11)
4. Three is the number of dimensions that humans can perceive. Humans perceive the universe to have three spatial dimensions

### 10. The triangle, a polygonwith three edgesand three vertices, is the most stable physical shape. For this reason it is widely utilized in construction, engineering and design.

Special properties of number 2 (Today’s Date)
1. 2 is the only even prime.
2. 2 is a Fibonacci number
3. 2 is a palindromic number in decimal system.
4. For any Polyhedron , V – E + F = 2 where V is the number of vertices, E is the number of edges, and F is the number of faces.
5. The atomic number of helium.
6. A honey bee must tap TWO million flowers to make ONE pound of honey!

Special properties of number 1 (Today’s Date)
1. 0! = 1
2. 1 is the atomic number of hydrogen
3.   Philo of Alexandria (20 BC – AD 50) regarded the number one as God's number, and the basis for all numbers
4. 1 is a Fibonacci number
5. 1 is a triangular number
6. 1 is a pentagonal number
7. 1 is a hexagonal number
8. 1 is a heptagonal number
9. 1 is a octogonal number
10. 1 is a palindromic number in decimal system
11. A list of primes to 10,006,721 published in 1914 by Derrick Lemher includes 1 as prime.
12. A, B , C , D , E, M, T, U, V , Y has one line of symmetry
13. Till 15th century 1 was not included in set of natural number. Simon Stevin included it in Natural number.