Question

What will be the sum of all odd numbers between 30 and 50?

Answer 1

Here first odd number is 31 and last one is 49 The common difference is 2 number of terms are 10

We know Sum = 10/2 ( 31 +49 )
$5 \times 80 =$
$400$
Therefore 400 is the answer

Answer 2

will be the ans of this question