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# GMAT Test M15 Master Thread - All discussions

Author Message
GMAT Club team member
Joined: 16 Mar 2009
Posts: 113

Kudos [?]: 1017 [0], given: 19

Location: Bologna, Italy

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12 May 2009, 23:45

Last edited by dzyubam on 26 Apr 2010, 02:11, edited 2 times in total.
q#7

Kudos [?]: 1017 [0], given: 19

Manager
Joined: 30 Jun 2004
Posts: 176

Kudos [?]: 29 [0], given: 5

Location: Singapore

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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.

Kudos [?]: 29 [0], given: 5

Manager
Joined: 30 Jun 2004
Posts: 176

Kudos [?]: 29 [0], given: 5

Location: Singapore

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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.

Kudos [?]: 29 [0], given: 5

CEO
Joined: 15 Aug 2003
Posts: 3452

Kudos [?]: 929 [0], given: 781

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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?

Kudos [?]: 929 [0], given: 781

Intern
Joined: 09 Sep 2010
Posts: 12

Kudos [?]: 9 [0], given: 11

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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.

Kudos [?]: 9 [0], given: 11

Senior Manager
Status: Happy to join ROSS!
Joined: 29 Sep 2010
Posts: 273

Kudos [?]: 133 [0], given: 48

Concentration: General Management, Strategy
Schools: Ross '14 (M)

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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.

Kudos [?]: 133 [0], given: 48

Manager
Affiliations: The Earth organization, India
Joined: 25 Dec 2010
Posts: 190

Kudos [?]: 15 [0], given: 12

WE 1: SAP consultant-IT 2 years
WE 2: Entrepreneur-family business 2 years

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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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Kudos [?]: 15 [0], given: 12

Re: GMAT Test M15 Master Thread - All discussions   [#permalink] 27 Jun 2011, 01:03
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# GMAT Test M15 Master Thread - All discussions

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