types of numbers
1.Natural
numbers
2.Whole
numbers
3.integers
4.Rational
numbers
*The counting numbers are called natural numbers. The set of natural numbers is shown by N,
is given by N = {1,2,3,4,….}
*All the natural numbers together with zero (0) are called whole
numbers
The set W = {0,1,2,3,4,…..}
* The set of negative and positive numbers with zero is
called integers.
Z={…..3,2,1,0,+1,+2,+3,….}
*RATIONAL NUMBERS: Numbers of the form like fraction i.e. p/q, where p and q are integers and
q≠0, are called rational numbers
some facts
Ø Every natural number is a whole number
Ø 1 is the smallest natural number while 0 is the
smallest whole number
Ø Every natural number is a rational number, in
general ‘n’ is a natural number, as n=n/1
Ø Every integer is a natural number, as we can write,
if ‘a’ is an integer, then a/1 is a rational number
Ø Every fraction is a natural number, a/b is a
rational number

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