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Natural number

The natural numbers can be ordered in several ways.

 

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Explanation

Natural numbers can be divided into even and odd numbers.

Natural numbers	Even numbers	Special case: 0
		Composite numbers	Squares of even numbers Numbers not perfect squares
		Only prime number: 2
	Odd numbers	Special case: 1
		Composite numbers	Squares of odd numbers Numbers not perfect squares
		Prime numbers	4n + 1 primes 4n + 3 primes

 

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