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GMAT Test M15 Master Thread - All discussions

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GMAT Club team member
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GMAT Test M15 Master Thread - All discussions [#permalink] New post 12 May 2009, 23:45

Last edited by dzyubam on 26 Apr 2010, 02:11, edited 2 times in total.
q#7
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Q23 [#permalink] New post 23 Jun 2010, 04:09
Should not the answer be B.

x^2 - y^2 = (x+y)(x-y)

Statement 2 says that x+y is divisible by 8. In that case (x+y)(x-y) is also divisible by 8.
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Q34 [#permalink] New post 23 Jun 2010, 04:25
IMHO, the wordings "company's monthly sales" is not very clear. May be the test maker can make it more clear by using the term "revenue" or something else.
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Re: Q34 [#permalink] New post 29 Jun 2010, 23:36
tarun wrote:
IMHO, the wordings "company's monthly sales" is not very clear. May be the test maker can make it more clear by using the term "revenue" or something else.


I thought it was OK. What else would a company's monthly sales mean? profits? costs?
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Re: GMAT Test M15 Master Thread - All discussions [#permalink] New post 05 Oct 2010, 13:50
Is there an error in Q.19 ?

How can the closest vertex near (0,0) be (1,1) whereas it has been clearly mentioned in the question that (6,2) is the one of the vertices of the diagonal. Hence the straight line will have (0,2) as the other vertex. The distance of (0,2) from (0,0) will be 2.
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Re: Q23 [#permalink] New post 25 Mar 2011, 11:38
tarun wrote:
Should not the answer be B.

x^2 - y^2 = (x+y)(x-y)

Statement 2 says that x+y is divisible by 8. In that case (x+y)(x-y) is also divisible by 8.


Ok, the trick is: the number is divisible by X if after division there is integer left and no remainder.

In this question, answer 2 precludes the situation when x=7.77, y = 0.23, so
(x+y)(x-y)/8 = integer*7,52
thus we need answer 1 and answer 2 to make sure that after division by 8 we'll end up with multiplying two integers.
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Re: GMAT Test M15 Master Thread - All discussions [#permalink] New post 27 Jun 2011, 01:03
sandhyash wrote:
Is there an error in Q.19 ?

How can the closest vertex near (0,0) be (1,1) whereas it has been clearly mentioned in the question that (6,2) is the one of the vertices of the diagonal. Hence the straight line will have (0,2) as the other vertex. The distance of (0,2) from (0,0) will be 2.




Dude, (0,2) makes it a rectangle instead of square.

Q#19 coordinate-plane-90772.html
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Re: GMAT Test M15 Master Thread - All discussions   [#permalink] 27 Jun 2011, 01:03
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