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Data Sufficiency Help!

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maroosh88
 Post subject: Data Sufficiency Help!
 Post Posted: Fri Jan 14, 2011 5:31 am 
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Course Students


Posts: 4
Hi,

I am a bit confused about data sufficiency questions which revolve around obtaining a single value.

I understand that value questions are sufficient only when they yield a single value.

But my question is, what is considered a single value? For example, when I get a result that involves a square root such as (10 square root 2) can this be considered a value? Does a single value refer to an integer only?

Help is appreciated thanks!
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jnelson0612
 Post subject: Re: Data Sufficiency Help!
 Post Posted: Sat Jan 15, 2011 10:39 am 
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ManhattanGMAT Staff


Posts: 1857
maroosh88 wrote:
Hi,

I am a bit confused about data sufficiency questions which revolve around obtaining a single value.

I understand that value questions are sufficient only when they yield a single value.

But my question is, what is considered a single value? For example, when I get a result that involves a square root such as (10 square root 2) can this be considered a value? Does a single value refer to an integer only?

Help is appreciated thanks!


Hi maroosh,
You seem to have a good grip on the concept of value questions in data sufficiency.

Yes, a value data sufficiency question is asking for a specific value. An example would be "what is x?" The statements must yield only one possible value for x, or they are insufficient.

A result with a square root is most definitely a specific value, as is a fraction. x could be 5, -2, 1/2, -1/4, or 10sqrt2. As long as any one of these numbers is the ONLY possible value for x, the statement is sufficient. x DOES NOT have to be an integer value.

I hope this helps!

_________________
Jamie Nelson
ManhattanGMAT Instructor
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