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11 Feb 2020, 01:11
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
72% (00:45) correct
28%
(00:51)
wrong
based on 47
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of 5^x?
1. x^3 =1/27
2. x^4=81
1. x^3 =1/27
2. x^4=81
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
11 Feb 2020, 11:00
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Can someone please explain how the answer is A? With stat 1 we get x=1/3 and stat 2 we get x=3. How are we then going with option A?
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firas92
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11 Feb 2020, 11:19
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Anulitha
We are not told that x is positive. So if x^4=81, x can be 3 or -3.
Remember that any non zero integer (positive or negative) raised to an even power will yield only a positive result
So statement 2 is not sufficient
