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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## ab = 0? ##### This topic has 1 expert reply and 1 member reply ### Top Member ## ab = 0? ab = 0? (1) a + b + ab = 0 (2) a - b = 0 Can some experts find the best Option in this? OA E ### GMAT/MBA Expert Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 122 members Upvotes: 1153 GMAT Score: 770 Top Reply lheiannie07 wrote: ab = 0? (1) a + b + ab = 0 (2) a - b = 0 Can some experts find the best Option in this? OA E Statement 1 - Case 1: a = 0 and b = 0. YES ab = 0 Case 2: a = -2 and b = -2. NO ab is not 0. Not sufficient. Statement 2: If a- b =0, then a = b. Notice that we can reuse both cases from statement 1, giving us a YES and a NO, both for statement 2 and together. Not sufficient. The answer is E _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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### Top Member

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6 members
DavidG@VeritasPrep wrote:
lheiannie07 wrote:
ab = 0?

(1) a + b + ab = 0
(2) a - b = 0

Can some experts find the best Option in this?

OA E
Statement 1 - Case 1: a = 0 and b = 0. YES ab = 0
Case 2: a = -2 and b = -2. NO ab is not 0.
Not sufficient.

Statement 2: If a- b =0, then a = b. Notice that we can reuse both cases from statement 1, giving us a YES and a NO, both for statement 2 and together. Not sufficient.

The answer is E
Thanks a lot!

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