Question

what is sum of 1 to 20 numbers?

Answer 1

Answer:

210 is the sum of the numbers from 1 to 20..

Hope it is correct!!

Answer 2

Sn = n/2(a + last term)

Sn = 10(1+ 20)

Sn = 210

❤❤I hope this will help you ❤❤