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# GMATprep Q's - DS

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Intern
Joined: 23 May 2008
Posts: 14

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25 May 2008, 11:34
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Would be greatful for some help...
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CEO
Joined: 17 Nov 2007
Posts: 3583
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Re: GMATprep Q's - DS [#permalink]

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25 May 2008, 12:00
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Manager
Joined: 24 Apr 2008
Posts: 161
Re: GMATprep Q's - DS [#permalink]

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26 May 2008, 03:20
Q1:
A & B have 16
B & C have 17
C & A have 18

Hence all we can say from the questions is A, B & C will have common not more than 16.

St1:Directly gives the answer as 9 hence sufficient
St2: Individual number of elements does not give the actual values which are in common so insufficient.

Hence Ans is A

Q2: The most important thing in this question is to understand it -
According to the question: 450<x<550 and 350<y<450
Hence => 800< x+y < 1000 => will be 800 if it lies btw 800 & 850; will be 900 if it lies btw 850 & 950 ; and finally will be 1000 if it is btw 950 & 1000

Statement 1: X < 500 doesnt provide an answer
St 2: Y <400 is not sufficient either

S1+S2: X+Y< 900 but from the question X+Y >800 hence this leads to either 800 or 900 as the answer hence Insuffi.

So choice is E
Intern
Joined: 23 May 2008
Posts: 14
Re: GMATprep Q's - DS [#permalink]

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26 May 2008, 06:15
VP
Joined: 18 May 2008
Posts: 1261
Re: GMATprep Q's - DS [#permalink]

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26 May 2008, 06:37
Can u expalin the rule for such kind of problem?

iamcartic wrote:
Q1:
A & B have 16
B & C have 17
C & A have 18

Hence all we can say from the questions is A, B & C will have common not more than 16.

St1:Directly gives the answer as 9 hence sufficient
St2: Individual number of elements does not give the actual values which are in common so insufficient.

Hence Ans is A

Q2: The most important thing in this question is to understand it -
According to the question: 450<x<550 and 350<y<450
Hence => 800< x+y < 1000 => will be 800 if it lies btw 800 & 850; will be 900 if it lies btw 850 & 950 ; and finally will be 1000 if it is btw 950 & 1000

Statement 1: X < 500 doesnt provide an answer
St 2: Y <400 is not sufficient either

S1+S2: X+Y< 900 but from the question X+Y >800 hence this leads to either 800 or 900 as the answer hence Insuffi.

So choice is E
Re: GMATprep Q's - DS   [#permalink] 26 May 2008, 06:37
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# GMATprep Q's - DS

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