Question

Find the sum of the first 123
even natural numbers​

Answer 1

Answer:

We know that even natural numbers are 2,4,6,8,10

Answer 2

Answer:

$sum \: of \: n \: natural \: numbers = \\ \frac{n(n + 1)}{2} \\ n = 123 \\ = > \frac{123(123 + 1)}{2} \\ \frac{123 \times 124}{2} \\ \frac{15252}{2} \\ = > 7626$