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What is the sum of a certain pair of consecutive odd

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What is the sum of a certain pair of consecutive odd [#permalink]

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New post 30 Aug 2006, 03:29
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Q14realtestc5

Q36:
What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.
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shinewine

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Re: DS : Integers [#permalink]

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New post 30 Aug 2006, 04:45
shinewine wrote:
Q14realtestc5

Q36:
What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.


Statement 1: could be infinate combinations ---> INSUFF

Statement 2: could be infinate combinations ---> INSUFF

Together, -1+1 = 0 ---> SUFF

(C)
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Re: DS : Integers [#permalink]

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New post 30 Aug 2006, 05:26
GMATT73 wrote:
shinewine wrote:
Q14realtestc5

Q36:
What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.


Statement 1: could be infinate combinations ---> INSUFF

Statement 2: could be infinate combinations ---> INSUFF

Together, -1+1 = 0 ---> SUFF

(C)

agree C for me 2
tricky question ))way to go Matt!
In this kind of question it is important to distiguish between At least one and Exactly one
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 [#permalink]

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New post 30 Aug 2006, 09:45
they key phrase is "pair"

C it is...
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Re: DS : Integers [#permalink]

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New post 31 Aug 2006, 02:06
GMATT73 wrote:
shinewine wrote:
Q14realtestc5

Q36:
What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.


Statement 1: could be infinate combinations ---> INSUFF

Statement 2: could be infinate combinations ---> INSUFF

Together, -1+1 = 0 ---> SUFF

(C)


why?when we combine st1 and st2 we can also get..a series like

-3,0,3,6,9 and here sum is not zero.. :roll:
.
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shinewine

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Re: DS : Integers [#permalink]

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New post 31 Aug 2006, 02:35
GMATT73 wrote:
shinewine wrote:
GMATT73 wrote:
shinewine wrote:
Q14realtestc5

Q36:
What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.


Statement 1: could be infinate combinations ---> INSUFF

Statement 2: could be infinate combinations ---> INSUFF

Together, -1+1 = 0 ---> SUFF

(C)


Because the question specifies a "pair" = only two numbers.
why?when we combine st1 and st2 we can also get..a series like

-3,0,3,6,9 and here sum is not zero.. :roll:
.


Oh god.. silly me.. just missed taht nuance..!!! :thanks
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shinewine

Re: DS : Integers   [#permalink] 31 Aug 2006, 02:35
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