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official guide 11th. PS #201 [#permalink]
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17 Feb 2009, 19:19
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i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0 201. If the sum of n consecutive integers is 0, which of the following must be true? (A)i only (B)ii only (C)iii only (D)i and iii (E)ii and iii plz help me to understand. I already looked up the answer key, but i could not understand how to figure it out.. == Message from GMAT Club Team == This is not a quality discussion. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.



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Re: official guide 11th. PS #201 [#permalink]
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17 Feb 2009, 20:57
emily0506 wrote: i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0
201. If the sum of n consecutive integers is 0, which of the following must be true?
(A)i only (B)ii only (C)iii only (D)i and iii (E)ii and iii
plz help me to understand. I already looked up the answer key, but i could not understand how to figure it out.. e.g 1,0,1 > n=3 is odd and avg=0 0 > n=1 is odd n must be odd to make the sum of consecuting integers zero. (ii) sume even number of consecutive integers, neverb to zero. avg = sum of integers/number of integers = 0/n=0 (ii) and (iii) MUST BE TRUE C.
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Re: official guide 11th. PS #201 [#permalink]
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17 Feb 2009, 23:39
i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0
i.  the sum can never be 0 ii.  it might, or might not be: 1,0,1 or 2,3,4 iii.  will always be true, so the answer is C.



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Re: official guide 11th. PS #201 [#permalink]
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18 Feb 2009, 00:01
peraspera wrote: i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0
i.  the sum can never be 0 ii.  it might, or might not be: 1,0,1 or 2,3,4 iii.  will always be true, so the answer is C. sum of 2,3,4  never be zero.. so .. this is ruled out.
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Re: official guide 11th. PS #201 [#permalink]
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18 Feb 2009, 11:32
x2suresh wrote: peraspera wrote: i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0
i.  the sum can never be 0 ii.  it might, or might not be: 1,0,1 or 2,3,4 iii.  will always be true, so the answer is C. sum of 2,3,4  never be zero.. so .. this is ruled out. Exactly, that's why the answer is C.



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Re: official guide 11th. PS #201 [#permalink]
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18 Feb 2009, 11:36
peraspera wrote: x2suresh wrote: peraspera wrote: i. n is an even number ii. n is an odd number iii. the average(arithmetic mean) of the n integers is 0
i.  the sum can never be 0 ii.  it might, or might not be: 1,0,1 or 2,3,4 iii.  will always be true, so the answer is C. sum of 2,3,4  never be zero.. so .. this is ruled out. Exactly, that's why the answer is C. Sorry!! I overlooked..(sleepy...sleepy) it thought E was only (III) Updated Answer in my orignal post.
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Re: official guide 11th. PS #201 [#permalink]
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20 Feb 2009, 15:04
Whats going on here? Isnt the answer E?
The Q says if the sum of n consecutive integers is 0, So even though 2,3,4 are consecutive, they don't qualify for this Q



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Re: official guide 11th. PS #201 [#permalink]
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24 Mar 2009, 05:10
Yeah, the answer should be E



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Re: official guide 11th. PS #201 [#permalink]
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24 Mar 2009, 15:30
icandy wrote: Whats going on here? Isnt the answer E?
The Q says if the sum of n consecutive integers is 0, So even though 2,3,4 are consecutive, they don't qualify for this Q Yes, it is E. Don't know what was there  maybe the original question got updated. It should be E, as it it reads now. == Message from GMAT Club Team == This is not a quality discussion. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.




Re: official guide 11th. PS #201
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