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Consecutive integers

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Consecutive integers

by davo45 » Sat Mar 12, 2011 2:05 am
For any positive integer n, the sum of the first n pos integers equals n(n+1)/2. what is the sum of all the even integers between 99 and 301?

(a) 10,100
(b) 20,200
(c) 22,650
(d) 40,200
(e) 45,120
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by rohu27 » Sat Mar 12, 2011 2:29 am
https://www.beatthegmat.com/sum-of-even- ... 73600.html
davo45 wrote:For any positive integer n, the sum of the first n pos integers equals n(n+1)/2. what is the sum of all the even integers between 99 and 301?

(a) 10,100
(b) 20,200
(c) 22,650
(d) 40,200
(e) 45,120
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