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11 Nov 2019, 04:15
Kudos
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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:
75%
(hard)
Question Stats:
45% (01:32) correct
55%
(01:09)
wrong
based on 310
sessions
History
Date
Time
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Not Attempted Yet
If x and y are positive integers, does \(x – y = 0\)?
(1) \((z^2)^x= z^{(2y)}\)
(2) \(z^2 = z\)
Are You Up For the Challenge: 700 Level Questions
(1) \((z^2)^x= z^{(2y)}\)
(2) \(z^2 = z\)
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
11 Nov 2019, 08:26
Kudos
Bookmarks
If x and y are positive integers, does \(x – y = 0\)?
(1) \((z^2)^x= z^{(2y)}\)...
\((z^{(2x)}= z^{(2y)}\)
If z=1, or z=-1 or z=0.... x need not be equal to y
(2) \(z^2 = z\)
\(z^2-z=0...z(z-1)=0\), so z can be 0 or 1... x need not be equal to y...\(1^2=1^7=1^2\)
Combined..
again z=0 or z=1...x can be equal to y or need not be y..
Insuff
E
(1) \((z^2)^x= z^{(2y)}\)...
\((z^{(2x)}= z^{(2y)}\)
If z=1, or z=-1 or z=0.... x need not be equal to y
(2) \(z^2 = z\)
\(z^2-z=0...z(z-1)=0\), so z can be 0 or 1... x need not be equal to y...\(1^2=1^7=1^2\)
Combined..
again z=0 or z=1...x can be equal to y or need not be y..
Insuff
E
30 Oct 2025, 08:27
Kudos
Bookmarks
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