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y is odd, is z odd?

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by Jim@StratusPrep » Fri Mar 29, 2013 7:25 am
1) The only way the product of 3 numbers can be odd is if all are odd. Z must be odd SUFFICIENT
2) We have no idea if Z or X is odd or even. INSUFFICIENT


A
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by Brent@GMATPrepNow » Fri Mar 29, 2013 7:50 am
As Jim has stated, the answer is A. However, I should point out that the answer is A only if we first restrict x, y and z to integer values.

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by GMATGuruNY » Fri Mar 29, 2013 2:41 pm
himu wrote:If y is odd, is z odd?

xyz = odd
yz = x
If the problem is not restricted to integers:

All of the conditions are satisfied if x=1, y=1, and z=1.
In this case, z is odd.

All of the conditions are satisfied if x=1, y=3, and z=1/3.
In this case, z is not odd.

The correct answer is E.
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by ice_rush » Sat Mar 30, 2013 11:59 am
I think the answer should be E -- Why are we assuming the numbers are integers? Together the two statements tell us that X is odd - don't know anything about Z.
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by himu » Sat Mar 30, 2013 9:36 pm
Yes Thanks ice_rush,GMATGuruNY,Brent@GMATPrepNow & Jim@StratusPrep,

The OA is E.
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by Jim@StratusPrep » Mon Apr 01, 2013 7:09 am
Yes.... lesson in reading to quickly there.
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