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22 Sep 2022, 00:48
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A
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Difficulty:
15%
(low)
Question Stats:
77% (00:58) correct
23%
(00:47)
wrong
based on 71
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If z is a positive integer, is √z an integer?
(1) √9z is an integer.
(2) √8z is not an integer.
(1) √9z is an integer.
(2) √8z is not an integer.
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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
22 Sep 2022, 02:49
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#1
√9z is an integer.
x has to be square of integer so yes to target
sufficient
#2
√8z is not an integer.
2√2*z
z may or may not be an integer
insufficient
option A
√9z is an integer.
x has to be square of integer so yes to target
sufficient
#2
√8z is not an integer.
2√2*z
z may or may not be an integer
insufficient
option A
carcass
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