Question

What is the sum of no.fromm 21to 82

Answer 1

Answer:

ans is 3152

Step-by-step explanation:

from the formula

{n(n+1)}/2

sum of numbers from 1 to 82 ={82(82+1)}/2

(82×83)/2

3362

from {n(n+1)}/2

sum of numbers from 1 to 20

{20(20+1)}/2

(20×21)/2

210

sum of the numbers from 21to82=sum of numbers from 1 to 82-sum of numbers from1 to 20

=3362-210

=3152