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03 Mar 2020, 04:04
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
69% (01:27) correct
31%
(01:15)
wrong
based on 123
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of w?
(1) \(w^2=18\)
(2) \(\frac{w^3}{\sqrt{18}}\) is an integer
Are You Up For the Challenge: 700 Level Questions
(1) \(w^2=18\)
(2) \(\frac{w^3}{\sqrt{18}}\) is an integer
Are You Up For the Challenge: 700 Level Questions
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
03 Mar 2020, 05:01
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eliminated a: because w can be negative or positive. we don't know for certain that it is positive.
selected b: because power is odd so there will be no change in sing hence it is positive plus dividing root 18 suggest w is root 18.
selected b: because power is odd so there will be no change in sing hence it is positive plus dividing root 18 suggest w is root 18.
03 Mar 2020, 07:14
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Bunuel
(1) \(w^2=18\)
--> \(w = ±\sqrt{18}\) --> Insufficient
(2) \(\frac{w^3}{\sqrt{18}}\) is an integer
--> Many values of \(w\) are possible = {\(\sqrt{18}\), -\(\sqrt{18}\), 2\(\sqrt{18}\), -2\(\sqrt{18}\), . . . . } --> Insufficient
Combining (1) & (2),
Possible values of \(w\) = {\(\sqrt{18}\), -\(\sqrt{18}\)}
--> No Definite value --> Insufficient
Option E
