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01 Sep 2020, 11:14
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B
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Difficulty:
55%
(hard)
Question Stats:
46% (01:13) correct
54%
(00:56)
wrong
based on 26
sessions
History
Date
Time
Result
Not Attempted Yet
If A = 1200, what is the unique value of B?
(1) The difference between A and B is 20% of B.
(2) The sum of A and B is 150% of B.
(1) The difference between A and B is 20% of B.
(2) The sum of A and B is 150% of B.
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01 Sep 2020, 12:02
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Poorly written Question! You should mention that it's an absolute difference. Also, we must get atleast 1 common value of B, using both statements.
Statement 1-
|A-B|= B/5
If A>B, A=6B/5
If A<B, A= 4B/5
2 values of B are possible.
Insufficient
Statement 2-
A+B = 3B/2
A = B/2
Sufficient
Statement 1-
|A-B|= B/5
If A>B, A=6B/5
If A<B, A= 4B/5
2 values of B are possible.
Insufficient
Statement 2-
A+B = 3B/2
A = B/2
Sufficient
kawal27
02 Sep 2020, 07:36
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kawal27
What is the source? As nick says, this is not a good question. It's not clear if Statement 1 means "A - B = 0.2B", in which case it's sufficient, or if it means |A - B| = 0.2B, in which case it's not sufficient. Under either interpretation, the two Statements are contradictory (no value of B works for both), and that can never happen on a real GMAT DS question. And even the wording of the question itself is bizarre. The letter B automatically stands for a single (at first, unknown) value. It can't stand for more than one value. So it is completely redundant to ask for "the unique value" of B. The question "what is the value of B?" means the same thing - information is sufficient if you can find the single numerical value of B, and is not sufficient if there is more than one possible numerical value of B. The wording here makes me wonder why the question writer thinks the words "unique value" need to be included - does the question writer think, if those words are left out, that a statement giving two solutions for B would be sufficient? It would never be, on the real GMAT. But if the source producing this question is unclear on that point, I'd recommend using study material written by someone who better understands the test.
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