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# What is the sum of a certain pair of consecutive odd

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Manager
Joined: 28 Jan 2006
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What is the sum of a certain pair of consecutive odd [#permalink]

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30 Aug 2006, 04:29
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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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30 Aug 2006, 05:45
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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Director
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30 Aug 2006, 06:26
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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30 Aug 2006, 10:45
they key phrase is "pair"

C it is...

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Manager
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31 Aug 2006, 03:06
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..
.
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shinewine

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Manager
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31 Aug 2006, 03:35
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..
.

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

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Re: DS : Integers   [#permalink] 31 Aug 2006, 03:35
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