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Sum of all the odd bumbers

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by neerajeai » Mon Feb 25, 2013 7:02 am
For any positive integer n, the sum of the first n positive integers equals n(n+1)/2.
What is the sum of all the ODD integers between 99 and 301?
A) 10100
B) 20200
C) 20402
D) 40200
E) 45150

OA will be posted in next 1 hour. Looking for the most efficient way of doing this.
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by Brent@GMATPrepNow » Mon Feb 25, 2013 8:10 am
We just discussed this question over here: https://www.beatthegmat.com/sum-of-all-t ... tml#586790

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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