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TheUltimateWinner
Joined: 23 Feb 2015
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Schools: Harvard '24 Judge '23 LBS '24 McCombs '24 Mendoza Tepper '24 Ross '24 Cox Marshall '24 Fisher Kelley '24 Jones McDonough '24 Owen '24 Terry BU Simon '24 Katz GWU Mason Babson Gabelli Foster '24 Goizueta '24 Scheller Stern '23 CBS '23 Booth '23 Haas '25 Wharton '25 Stanford '26 Johnson'23 Fuqua '23 Kellogg '23 Kenan-Flagler'23 INSEAD Aug 22 intake Olin '23 Said '23 Sloan '23 Carey Arizona "22 Yale '23 UC Davis Madison '23 Anderson '23 Carroll Carlson '23 Darden '23
Posts: 2,464
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2,510
27 Mar 2019, 01:49
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C
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:
42% (00:53) correct
58%
(00:58)
wrong
based on 53
sessions
History
Date
Time
Result
Not Attempted Yet
Is \(x=3?\)
1) \(x^2=9\)
2) \(x=\frac{y^2}{7}\); y is real
1) \(x^2=9\)
2) \(x=\frac{y^2}{7}\); y is real
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
27 Mar 2019, 09:12
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AsadAbu
Is \(x=3?\)
1) \(x^2=9\)
x can be 3 or -3
insuff
2) \(x=\frac{y^2}{7}\); y is real
7x=\(y^2\), so x cannot be negative.
Insuff
Combined
x can be just 3
C
27 Mar 2019, 17:59
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AsadAbu
Where did this problem come from? I'm curious because I've never seen anything quite like the second statement in an official problem - although real numbers are tested on the GMAT, I haven't really seen a problem that focused on the properties of real numbers (as opposed to imaginary numbers) in this way.
