Natural Numbers

One of the curliest mathematical skills that a child has to learn os the skill of counring, i.e. 'one, two, three, ...'. In mathematics these numbers are called the counting or natural numbers.

Notation :

(i)		= the set of positive integers
		= the set of natural numbers
(ii)		= {1, 2, 3, ...}
(iii)	0	Ï

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