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Math Expert
Joined: 02 Sep 2009
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Question Stats:
58% (00:46) correct 42% (00:56) wrong based on 144 sessions
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Math Expert
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Posts: 52231

Re M1614
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15 Sep 2014, 23:58



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M1614
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Updated on: 18 Dec 2015, 09:07
I think this is a poorquality question and the explanation isn't clear enough, please elaborate. Do we need to be told in the question prompt that a>b?
Nevermind, I get it now too. Either it will yield a noninteger or an odd integer, NEVER an even integer!
Originally posted by jvh42 on 01 Dec 2015, 09:22.
Last edited by jvh42 on 18 Dec 2015, 09:07, edited 1 time in total.



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hi Bunuel, I get that both a and b are odd from statement 1. But what tells us that a/b actually yields an integer? I chose E because I found no proof that a was divisible by b to begin with. I am thinking wrong here? Thanks
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Senior Manager
Joined: 23 Sep 2015
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Location: France
GMAT 1: 690 Q47 V38 GMAT 2: 700 Q48 V38
WE: Real Estate (Mutual Funds and Brokerage)

Re: M1614
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18 Dec 2015, 09:03
Actually, never mind my question, I get it. Thanks
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Re: M1614
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04 Jan 2016, 12:24
I think, (E) should be the answer. (A) would be the answer provided the condition a>b is given in question.
Nevertheless, got the Q. Thanks for everything Gmat club!



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Re: M1614
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05 Jan 2016, 00:56



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Re: M1614
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13 Mar 2017, 12:12
I solved it using the general rule for odd and even numbers.
Multiplication:  (i)odd * odd = odd (ii)odd * even= even (iii)even* even = even
Addition/subtraction  (iv)Odd +/ Odd = Even (v)Even +/ Odd= Odd (vi)Even +/ Even = Even
Applying the above rule to the question,
1 stmt) given ab is odd, that means a and b are odd numbers  applies rule (i) ONLY. so a/b yields either a fraction or an odd integer but not a even integer. So this stmt is sufficient, as it gives an answer no.
2nd stmt) a and b can be either odd or even  applies rule (iv) or (vi). So can't conclude. Not sufficient.
Hope this helps!










