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Positive Integers

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Positive Integers

by arbiter » Sun Sep 27, 2009 10:34 pm
A certain list conists of several different integers. Is the product of all the integers in the list positive?

1>the product of all the greatest and smallest of the integers in the list is positive.
2>there is an even number of integers in the list.

OA is C
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hmm

by JeffB » Mon Sep 28, 2009 8:11 am
Statement I:

Tells us the list of numbers are either negative or positive:

Ex: -4, -2, -1 etc.
or 4, 2, 1 etc.

InSuff.

Statement II:

Tells us the list has an even amount of #s

Ex: -1, 1, 2, 4
Ex: -3, -2, -1, 1

Insuff.

Together:

If all the numbers in the list are either positive or negative, and there's an even number of them, then the product of those numbers will always be positive.

Hope that helps.
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