Question

Find the sum of the whole numbers from 1 to 720

Answer 1

The sum of the whole numbers from 1 to 720 is 259560.

Explanation:

To find : The sum of the whole numbers from 1 to 720 ?

Solution :

The whole numbers from 1 to 720 form an arithmetic progression,

The first term is a=1

The last term is l=720

The number of terms n=720

The sum formula of A.P is

`S_n=(n)/(2)[a+l]`

Substitute the values in the formula,

`S_(720)=(720)/(2)[1+720]`

`S_(720)=360* 721`

`S_(720)=259560`

Therefore, The sum of the whole numbers from 1 to 720 is 259560.