Question

find the sumof the odd number between 0 and 50

Answer 1

1 +3+5+7......+49

the no. of odd numbers is 25

so sum is 25²=625

Hope it helps

Answer 2

sum of odd numbers from 0 to 50

=(n/2)²

=(50/2)²

=(25)²

=625

Tip-sum of first odd numbers from 0 to n=(n/2)²