Find the sum of all the numbers from 1 to 200.

Given: Numbers from 1 to 200.

To find: Here we have to find the sum of all the numbers from 1 to 200.

Solution:

We can get the answer by using the formula:

$S\ =\ \frac{n( n\ +\ 1)}{2}$

Putting value of n = 200:

$S\ =\ \frac{200(200\ +\ 1)}{2}$

$S\ =\ 100\ \times\ 201$

$S\ =\ \mathbf{20100}$

So, sum of all the numbers from 1 to 200 is 20100.