Question

Find the sum of first 25 counting numbers​

Answer 1

Step-by-step explanation:

$sum = \frac{n(n + 1)}{2}$

=25(25+1)/2

=25×26/2

=650/2

=32

Please mark Brainliest if satisfied

And follow me for help in future

Answer 2

Answer:

325

Step-by-step explanation:

Formula Of Sum Of n integer Number

$= > \frac{n(n + 1)}{2}$

n=25 Put In Formula

$= > \frac{n(n + 1)}{2} \\ \\ = > \frac{25(25 + 1)}{2} \\ \\ = > \frac{25 \times 26}{2} \\ \\ = > \frac{650}{2} \\ \\ = > \frac{325 \times 2}{2} \\ \\ = > 325$