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Facts about the number 2

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0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are the ten numbers that make up every other number! Two is the second number in the numeral system. Two follows one and precedes three. Two is the first and smallest prime number and it is also the only even prime number which makes two extra unique.
Two is associated with pairs, duos, couples and deuces. Hence, two is often associated with romance and Valentine’s Day due to its tie in with couples and pairs.

Two is also prominently featured in several games. In cards, two is the lowest card in the pack since one is presented by ace. Meanwhile, in chess and checkers, both two-player games, there are two colors—usually black and white—that represent two different sides.

There are also lots of things that have two sides or components. For example, scissors have two blades and a piece of paper has two sides. Clocks have two hands and bicycles have two wheels. There are also lots of “two sets” on people’s bodies. For instance, humans have two eyes, two arms, two legs, two hands, two feet, two ears, and two nostrils.

Below are five facts about the number 2:

Two as a Concept
Two as a Concept Ethan Miller/Getty Images

Two as a Concept

Two can also be used to describe certain concepts or situations. For example, there are at least two sides to every argument and the term “two-dimensional” means that something has width and length but no depth. Twins always come in twos and so, when two people or objects are very much alike, they might be called “twins.”

Two and Math
Two and Math David Ramos/Getty Images

Two and Math

Mathematically speaking, any number that is divisible by two is an even number. Since two is the only even prime number all other even numbers can be divided by two.  Out of all the prime numbers, two and three are the only consecutive prime numbers.

Two and Binary Code
Two and Binary Code Omar Havana/Getty Images

Two and Binary Code

In binary code, which is sometimes referred to as “computer code,” all the coded numbers are written to the base two. Since binary code uses just 0 and 1 the numbers 1, 2, 3, 4, 5, 6, etc., become 1, 10, 11, 100, 101, 110, etc.

Two as a Composite Number
Two as a Composite Number Harry How/Getty Images

Two as a Composite Number

Two is considered to be a highly composite number because it has more divisors than the number one. The next such highly composite number is four. Two is also special because the square root of 2 holds the distinction as being the first known irrational number.

The Symbolism of Two
The Symbolism of Two Streeter Lecka/Getty Images

The Symbolism of Two

Two is also a number that has a lot of numerological significance. For example, a lot of philosophies break down behavior into two basic parts: good and evil. In China, two is considered to be a good number because there is an adage that says “good things come in pairs.”

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