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24 Aug 2008, 01:30
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pls explain the meaning of this to me ... could not quite get it...
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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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24 Aug 2008, 01:40
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arjtryarjtry
Statement 1) xz is even which means either z is even or x is even or both are even.
If x is even and x is factor of z then z will be even
Statement 2) y is even
If y is even and factor of z then z will have to be even
IMO D)
24 Aug 2008, 09:15
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arjtryarjtry
D
If x is a factor of y and y is a factor of z, then z is divisible by both x and y. Said another way, z is a multiple of x and is also a multiple of y.
(1) Sufficient
If the product of two numbers is even, then at least one of the numbers is even.
Three possibilities:
z odd, x even
z even, x odd
z even, x even
From the original statement, we know that z is a multiple of x, so we can eliminate the first possibility because the multiple of an even number is always even. All the rest of the cases have z as even.
(2) Sufficient
Because z is a multiple of y, and y is even. z must be even.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
