Find the sum of the whole numbers from 1 to 710?

Question

Answer

You can use Gauss's formula

(N/2) x (first number + last number) = sum

N is the number of integers. 

So:

710/2 x (1 plus 710) = 355 x 711 = 252,405

Answer

1 + 710 = 711
2 + 709 = 711
3 + 708 = 711

and so on for 355 sums. So 355 x 711 = 252405

That is the same process Gauss used to compose his formula.

Find the sum of the whole numbers from 1 to 710?

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