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

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12 Jun 2008, 08:58

bsd_lover wrote:

C

From A The values of x and y can be anything e.g. 1 3 , 5 7 , -1 1 as long as either is positive <-- INSUFFICIENT

From B The values of x and y can also be anything as long as one of them is negative e.g. -5 -3 , -1 1 etc. <-- INSUFFICIENT

When you combine them then the only values x and y can be are -1 and 1. Hence their sum is 0. Hence SUFFICIENT.

BSD can u please elaborate the explanation (for both statements put together) When you combine them then the only values x and y can be are -1 and 1. Hence their sum is 0.

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

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12 Jun 2008, 09:38

vdhawan1 - These are "consecutive" odd integers. if you take any -ve odd interger other than -1, the corresponding will also be negative, so the set will not satisfy both statements. Only (-1,1) will satify both.

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

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08 Oct 2013, 01:58

durgesh79 wrote:

vdhawan1 - These are "consecutive" odd integers. if you take any -ve odd interger other than -1, the corresponding will also be negative, so the set will not satisfy both statements. Only (-1,1) will satify both.

Can someone expain, why the set (-5, -3,-1,1) can't be taken? It has both"Atleast one -ve" and "one +ve odd integer", and is a pair of consecutive odd integers.

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.

vdhawan1 - These are "consecutive" odd integers. if you take any -ve odd interger other than -1, the corresponding will also be negative, so the set will not satisfy both statements. Only (-1,1) will satify both.

Can someone expain, why the set (-5, -3,-1,1) can't be taken? It has both"Atleast one -ve" and "one +ve odd integer", and is a pair of consecutive odd integers.

That's because we have a pair of consecutive odd integers, so 2 integers only.

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

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09 Oct 2013, 10:08

Ahh.. my bad, I misread it. Thanks for clarifying!

Bunuel wrote:

asingh203 wrote:

durgesh79 wrote:

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.

vdhawan1 - These are "consecutive" odd integers. if you take any -ve odd interger other than -1, the corresponding will also be negative, so the set will not satisfy both statements. Only (-1,1) will satify both.

Can someone expain, why the set (-5, -3,-1,1) can't be taken? It has both"Atleast one -ve" and "one +ve odd integer", and is a pair of consecutive odd integers.

That's because we have a pair of consecutive odd integers, so 2 integers only.

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

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17 Apr 2015, 04:54

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

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14 Jan 2017, 22:51

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What is the sum of a certain pair of consecutive odd integers?

(1) At least one of the integers is negative --> infinite pairs are possible: ... (-3, -1); (-17, -15); ... (-1, 1); ... Not sufficient. (2) At least one of the integers is positive --> infinite pairs are possible: ... (3, 5); (19, 21); ... (-1, 1); ... Not sufficient.

(1)+(2) One odd integer must be positive and another negative. As they are consecutive odd integers, there is only one pair possible (-1, 1) --> -1+1=0. Sufficient.