Question

Find al the sum of natural numbers between 1 to 100

Answer 1

I think 5050 is the answer....

Answer 2

A.P can be formed that is :-

1 , 2 , 3 .......... 100

a ( first term ) :- 1

d ( common difference ) :- 1

l ( last term ) :- 100

n = ?

Sn = ?

an = a + ( n - 1 )d

100 = 1 + ( n - 1 ) × 1

100 = 1 + n - 1

100 = n


$sn = \frac{n}{2} (a + l)$


$sn = \frac{100}{2} (1 + 100)$

Sn = 50 ( 101 )

Sn = 5050

So,

Sum of first 100 natural number is 5050