SOLUTION: find the sum of the first 500 counting numbers

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Question 447576: find the sum of the first 500 counting numbers
Answer by solver91311(24713) About Me  (Show Source):
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500 + 1 = 501

499 + 2 = 501

498 + 3 = 501

. . .

251 + 250 = 501

And there are 500/2 = 250 such pairs.

In general, the sum of consecutive positive integers is given by:



So for your problem:



Super Double Plus Extra Credit:

What is the sum of the even integers between 200 and 300 inclusive?



John

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