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GMAT Test M15 Master Thread - All discussions

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timetrader
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GMAT Test M15 Master Thread - All discussions [#permalink] New post   Updated on: 26 Apr 2010, 03:11
Discussion of Questions in GMAT Test M15

Question 1 | -
Question 2 | -
Question 3 | Discussion
Question 4 | -
Question 5 | -
Question 6 | -
Question 7 | -
Question 8 | -
Question 9 | -
Question 10 | Discussion
Question 11 | -
Question 12 | -
Question 13 | -
Question 14 | -
Question 15 | -
Question 16 | -
Question 17 | -
Question 18 | Discussion
Question 19 | -
Question 20 | -
Question 21 | -
Question 22 | -
Question 23 | -
Question 24 | -
Question 25 | -
Question 26 | -
Question 27 | -
Question 28 | -
Question 29 | -
Question 30 | -
Question 31 | Discussion
Question 32 | -
Question 33 | -
Question 34 | -
Question 35 | -
Question 36 | -
Question 37 | -

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Originally posted by timetrader on 13 May 2009, 00:45.
Last edited by dzyubam on 26 Apr 2010, 03:11, edited 2 times in total.
q#7
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Re: GMAT Test M15 Master Thread - All discussions [#permalink] New post   23 Jun 2010, 05:09
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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Re: GMAT Test M15 Master Thread - All discussions [#permalink] New post   23 Jun 2010, 05:25
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: GMAT Test M15 Master Thread - All discussions [#permalink] New post   30 Jun 2010, 00:36
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, 14:50
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: GMAT Test M15 Master Thread - All discussions [#permalink] New post   25 Mar 2011, 12:38
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, 02:03
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]
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