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What is the product of a certain pair of consecutive odd

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What is the product of a certain pair of consecutive odd [#permalink] New post 15 Oct 2010, 23:27
What is the product of a certain pair of consecutive odd integers?

1.Exactly one of the integers is negative.
2.At least one of the integers is positive.

i thought that we need to find the answer to the question and selected E as we won't be able to find the answer
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Re: Di equation [#permalink] New post 15 Oct 2010, 23:39
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mrinal2100 wrote:
What is the product of a certain pair of consecutive odd integers?

1.Exactly one of the integers is negative.
2.At least one of the integers is positive.

i thought that we need to find the answer to the question and selected E as we won't be able to find the answer


Yes, we need to find an asnwer. But A is sufficient. Since we know there is a pair of integers of which exactly one is negative, the only possible pair is {-1,1} and hence the product is -1.
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Re: Di equation [#permalink] New post 16 Oct 2010, 02:01
shrouded, i choose option a too, but for -1 and 0, so the product of both begn 0, why did you choose 1 and -1 ? thank you in advance
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Re: Di equation [#permalink] New post 16 Oct 2010, 02:22
Because it says odd integers

0 is not odd

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Re: What is the product of a certain pair of consecutive odd [#permalink] New post 18 Nov 2011, 20:36
how if we plug the other odd numbers in? e.g. (3,-3) or (5,-5)
i'm still not sure whether the question is asked the exact number or just negative or positive number as the result
anyone can explain this to me? thanks :D
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Re: What is the product of a certain pair of consecutive odd [#permalink] New post 18 Nov 2011, 23:23
evdo wrote:
how if we plug the other odd numbers in? e.g. (3,-3) or (5,-5)
i'm still not sure whether the question is asked the exact number or just negative or positive number as the result
anyone can explain this to me? thanks :D


Evdo,the question statement says,
A Pair of Consecutive Odd Integers.
So,the only possibility is of (-1,1)

I hope that answers your question.
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Re: What is the product of a certain pair of consecutive odd [#permalink] New post 19 Nov 2011, 11:56
+1 A

(-1,1) is the only pair
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Re: What is the product of a certain pair of consecutive odd [#permalink] New post 20 Nov 2011, 00:56
mrinal2100 wrote:
What is the product of a certain pair of consecutive odd integers?

1.Exactly one of the integers is negative.
2.At least one of the integers is positive.

i thought that we need to find the answer to the question and selected E as we won't be able to find the answer



From S1, the only possibility is of -1 and 1, whereas from S2, there is possibility of not only -1 and 1, but also of 1,3 or 3,5 etc.

Thus S1 is the correct answer.

A
Re: What is the product of a certain pair of consecutive odd   [#permalink] 20 Nov 2011, 00:56
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