Question

THE SUM OF ALL NATURAL NUMBERS FROM 1 TO100IS

Answer 1

the natural no.s from 1 to 100
                           1,2,3,4,5,6.................100
a = 1
d = 1
n = 100
                   Sn = n/2(2a+(n-1)d)
                         = 100/2 (2+99)
                         = 50 (101)
                         = 5050

Answer 2

answer is 5050.
first natural number is 1 ,last natural number is 100 from given data .then total natural numbers between 1to 100 are 100.
so by calculating as follows we get,
(1+100)/2×100=5050