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# If a, b, c, and d are positive integers, is (a/b) (c/d) >

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Intern
Joined: 23 Aug 2006
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If a, b, c, and d are positive integers, is (a/b) (c/d) > [#permalink]  16 Oct 2006, 17:31
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0% (00:00) correct 0% (00:00) wrong based on 1 sessions
If a, b, c, and d are positive integers, is (a/b) (c/d) > c/b?
(1) c > b
(2) a > d
Director
Joined: 17 Jul 2006
Posts: 716
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A alone not sufficient

B alone not sufficient

C both are sufficient to answer.
Director
Joined: 05 Feb 2006
Posts: 899
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Kudos [?]: 54 [0], given: 0

I think B...

The question asks whether (a/b)*(c/d)>c/b or....divide by a/b

c/d>(c/b)*(b/a)
c/d>c/a

1/d>1/a... that is the question.....

from 2) a>d, means that the answer to the question is YES....
SVP
Joined: 01 May 2006
Posts: 1798
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(B) as well

(a/b) (c/d) > c/b ?
<=> a/d * c/d > c/d ?

=> a/d > 1 ? as a, b, c and d are postive integers
<=> a > d ?

Stat1 : Brings nothing

Stat2 : Exactly what we need
Director
Joined: 23 Jun 2005
Posts: 847
GMAT 1: 740 Q48 V42
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Kudos [?]: 36 [0], given: 1

B

Question: Is a/d > 1 ?

Statement 1: INSUFF

Statement 2: SUFF
Senior Manager
Joined: 01 Oct 2006
Posts: 498
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Same explanantion as anand gave above. The answer is B
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