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D
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2A + 2B + 18 = 0 what is B?
(1) A = B
(2) A = 3
(1) A = B
(2) A = 3
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
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25 Aug 2013, 16:12
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2A + 2B + 18 = 0 what is B?
(1) A = B --> 2B + 2B + 18 = 0 --> B = -9/2. Sufficient.
(2) A = 3 --> 6 + 2B + 18 = 0 --> B = -12. Sufficient.
Technically answer should be D, as EACH statement ALONE is sufficient to answer the question.
But even though formal answer to the question is D (EACH statement ALONE is sufficient), this is not a realistic GMAT question, as: on the GMAT, two data sufficiency statements always provide TRUE information and these statements never contradict each other. But the statements above contradict each other:
From (1) we have that B = -9/2 and from (2) we have that B = -12. The statements clearly contradict each other.
So, the question is flawed. You won't see such a question on the test.
P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Thank you.
(1) A = B --> 2B + 2B + 18 = 0 --> B = -9/2. Sufficient.
(2) A = 3 --> 6 + 2B + 18 = 0 --> B = -12. Sufficient.
Technically answer should be D, as EACH statement ALONE is sufficient to answer the question.
But even though formal answer to the question is D (EACH statement ALONE is sufficient), this is not a realistic GMAT question, as: on the GMAT, two data sufficiency statements always provide TRUE information and these statements never contradict each other. But the statements above contradict each other:
From (1) we have that B = -9/2 and from (2) we have that B = -12. The statements clearly contradict each other.
So, the question is flawed. You won't see such a question on the test.
P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Thank you.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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