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Is range of S > 2????

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tejkumar.m
 Post subject: Is range of S > 2????
 Post Posted: Thu Mar 11, 2010 3:09 am 
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Students


Posts: 14
Hi Manhattan staff,

Can you please help me out with the below DS problem?? I thought the answer is E.

[Deleted because this question is from a banned source. Please see below.]


OA is "Using A alone" i.e. "A"

This is an OG Quant problem. The solution says

1) This reveals that the difference between two of the numbers of the set is >2 , which means that the range of the 4 numbers must also be > 2. so, sufficient.

Can you just plug-in and explain this.. Am able to understand this to some extent but not perfectly...

Thank You
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cyapt81
 Post subject: Re: Is range of S > 2????
 Post Posted: Sat Mar 20, 2010 4:17 pm 
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Posts: 7
Range is defined as the (greatest term) - (lowest term). The question is asking whether the first term of set S minus the last term is greater than 2.

(1) If W - Z > 2 then W>2+Z. That means that there are two numbers in set S that are at least 2 numbers apart. E.g. Z = 2 and W = 5. It doesn't matter what the other numbers are. If x and y are between Z and W then the range will be W minus Z which equals 3. If one of x and y are either greater than or less than 2 and 5 then the range will still be greater than 2. SUFFICIENT.

(2) Tells us nothing about Z or the rest of the numbers.

A.
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akhp77
 Post subject: Re: Is range of S > 2????
 Post Posted: Sat Mar 27, 2010 1:46 am 
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Students


Posts: 114
Statement 1:
w-z > 2
=> w>z
Other two numbers might be > w, in between w & z, or < z.
No matter what are the other two numbers the range will always greater than 2

Sufficient

Statement 1:

Insufficient
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StaceyKoprince
 Post subject: Re: Is range of S > 2????
 Post Posted: Tue Apr 27, 2010 11:34 am 
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ManhattanGMAT Staff


Posts: 5788
Location: San Francisco
Please read (and follow!) the forum guidelines before posting. OG is a banned source; it is illegal to post OG questions anywhere on the web. GMATPrep questions are okay, but not OG-only questions.

If you are in one of our classes, please ask OG questions during office hours or before/after class.

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Stacey Koprince
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Director of Online Community
ManhattanGMAT
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