Hi,
A=-B
1. A is positive.
2. (A+B)^{2} is positive.
THe answer is meant to be B.
Could someone please walk me through the answer?
Thanks!!
Number properties
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- DavidG@VeritasPrep
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I'm assuming the original question was "Is A = - B?"
You could add 'B' to both sides so that the rephrased question is "Is A + B = 0?"
S1: tells us nothing about B, so Not Sufficient.
S2: If (A + B)^2 is positive, we know that A + B is positive. If A + B is positive, we know that it isn't equal to 0. Because we know definitively that the answer to the question is "NO,' this statement alone is Sufficient.
You could add 'B' to both sides so that the rephrased question is "Is A + B = 0?"
S1: tells us nothing about B, so Not Sufficient.
S2: If (A + B)^2 is positive, we know that A + B is positive. If A + B is positive, we know that it isn't equal to 0. Because we know definitively that the answer to the question is "NO,' this statement alone is Sufficient.
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Hi petud,
DS questions are unique to the GMAT; most Test Takers need time to learn the format and the logic behind these types of questions, so what you're experiencing is quite common. Thankfully, there are patterns to DS questions and tactics that you can repeatedly use to get to the correct answer. You just need the proper practice materials and study time.
How long have you been studying?
What resources have you been using?
GMAT assassins aren't born, they're made,
Rich
DS questions are unique to the GMAT; most Test Takers need time to learn the format and the logic behind these types of questions, so what you're experiencing is quite common. Thankfully, there are patterns to DS questions and tactics that you can repeatedly use to get to the correct answer. You just need the proper practice materials and study time.
How long have you been studying?
What resources have you been using?
GMAT assassins aren't born, they're made,
Rich
GMAT/MBA Expert
- Brent@GMATPrepNow
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You're not alone; EVERYONE struggles with Data Sufficiency (DS) questions at first. Keep in mind that this question type is unique to the GMAT, so it's totally foreign territory.petud wrote:THank you David! I need to get used to data sufficiency questions!! I was answeirng NO and nto suff and the same time!!
It just takes time for the concepts and strategies to become secondary, at which point you may come to find that DS questions are actually easier than Problem Solving questions.
I could start listing dozens of DS strategies and common mistakes (like confusing the answer to sufficiency question to the answer to the target question), but it's easier to just direct you to our free set of videos that cover everything you need to know to tackle DS questions: https://www.gmatprepnow.com/module/gmat-data-sufficiency
Cheers,
Brent