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28 Jun 2016, 11:22
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On the GMAT, if we encounter a question that states that: "The differences of X & Y is 4" does it mean:
X-y=4
OR
Y-X=4
Or
We need to take both situation 1 & Situation 2 into account and solve for X &Y
I'm asking because some study guides tell us that we need to assume scenario 1, but I find it odd.
X-y=4
OR
Y-X=4
Or
We need to take both situation 1 & Situation 2 into account and solve for X &Y
I'm asking because some study guides tell us that we need to assume scenario 1, but I find it odd.
28 Jun 2016, 11:29
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Hi kanav06,
GMAT questions are always specifically worded (since they're meant to test you on specific concepts). As such, you really have to pay careful attention to what you're told.
The phrase "X and Y differ by 4" means that one of the variables is 4 greater than the other. So we could have....
X - Y = 4
OR
Y - X = 4
With a phrase such as "Student X scored 4 more points than Student Y", then we KNOW that X > Y and we would have just one equation:
X = Y + 4
GMAT assassins aren't born, they're made,
Rich
GMAT questions are always specifically worded (since they're meant to test you on specific concepts). As such, you really have to pay careful attention to what you're told.
The phrase "X and Y differ by 4" means that one of the variables is 4 greater than the other. So we could have....
X - Y = 4
OR
Y - X = 4
With a phrase such as "Student X scored 4 more points than Student Y", then we KNOW that X > Y and we would have just one equation:
X = Y + 4
GMAT assassins aren't born, they're made,
Rich
28 Jun 2016, 11:34
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Bookmarks
EMPOWERgmatRichC
Hi,
Please refer to page 34 of the GMAT CLub math book (attached). It states that in such a case we must ALWAYS assume it to be x-y.
Is this incorrect?
-kanav
Attachments
File comment: Please refer to page 34
GMAT Club Math Book v3 - Jan-2-2013.pdf [2.83 MiB]
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