Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

1) Simpliy Question is a = b -c => a+c =b or -a = b-c => c-a = b It is a 2 part question a+c =b? or c-a=b? 2) Evaluate 1. Insufficiant We dont know if c-a = b 3) Evaluate 2. Insufficient we dont know the value of a and b 4) Evaluate 1 and 2 together 1. a+c != b 2. a is -ve so c-(-a)=> C+a =b? 1 says it is not Sufficient to answer that |a|!=b -c

If a = -1, b=0, and c=0, then both statements are true, and the answer to the question is 'no'.

If a = -1, b = 1 and c = 0, then both statements are true, and the answer to the question is 'yes'.

The answer is E. _________________

Nov 2011: After years of development, I am now making my advanced Quant books and high-level problem sets available for sale. Contact me at ianstewartgmat at gmail.com for details.

Thank you for the example Ian. I thought it was E as well, and wanted to see if I was missing something.

This question comes from Jeff Sackmans extreme challenge. He has C listed as the answer. I'm going to shoot him an e-mail and see if he responds. Looks like an error.

I couldn’t help myself but stay impressed. young leader who can now basically speak Chinese and handle things alone (I’m Korean Canadian by the way, so...