How many natural number are there from $1$ to $100$.

Given: Natural numbers from $1$ to $100$.

To do: To find that how many natural numbers are there from $1$ to $100$.

As given natural numbers from $1$ to $100$ are: $1,\ 2,\ 3,\ 4,\ ......,\ 100$.

 

Here , it is an A.P.,

First term $a=1$, last term $l=100$, common difference, $d=1$

To find $n=?$

As known, $l=a+(n-1)d$

$\Rightarrow 100=1+( n-1)1$

$\Rightarrow  n-1=100-1$

$\Rightarrow n=100$

Thus, there are $100$ natural numbers from $1$ to $100$.