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21 Feb 2022, 08:55
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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:
45%
(medium)
Question Stats:
55% (01:08) correct
45%
(01:09)
wrong
based on 121
sessions
History
Date
Time
Result
Not Attempted Yet
What is the cube root of x?
(1) The fourth root of x = 3
(2) \(x^2 = 6561\)
(1) The fourth root of x = 3
(2) \(x^2 = 6561\)
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
21 Feb 2022, 22:37
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Snehaaaaa
(1) The fourth root of x = 3
\(\sqrt[4]{x}=3...........x=3^4=81\)
So, \(\sqrt[3]{x}=\sqrt[3]{81}\)
Sufficient
(2) \(x^2 = 6561=81^2\)
so x= 81 or -81
In each case, cube root will be different.
Insufficient
A
05 Apr 2022, 10:08
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Concerning statement 2: We can't take the square root of a negative number, so there is only one number left which is x = 81 --> Sufficient?
Where is my error?
Where is my error?
