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The sum of n consecutive positive integers starting from 1

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Joined: 14 Dec 2004
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The sum of n consecutive positive integers starting from 1 [#permalink] New post 06 Mar 2005, 17:09
The sum of n consecutive positive integers starting from 1 is less than 100 . What is the greatest possible value of n?

A) 10
B) 11
C) 12
D) 13
E) 14
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 [#permalink] New post 06 Mar 2005, 17:17
"D"

sum = n(n+1) /2 .....n = 13 is max
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 [#permalink] New post 06 Mar 2005, 18:24
D...too late :x
  [#permalink] 06 Mar 2005, 18:24
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The sum of n consecutive positive integers starting from 1

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