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07 Sep 2019, 20:24
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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:
75%
(hard)
Question Stats:
34% (01:01) correct
66%
(00:47)
wrong
based on 134
sessions
History
Date
Time
Result
Not Attempted Yet
Is x*y*z a multiple of 3?
(1) x is a multiple of 9.
(2) y and z are prime numbers greater than 3.
(1) x is a multiple of 9.
(2) y and z are prime numbers greater than 3.
saurabh9gupta
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07 Sep 2019, 20:42
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Ok
My take.
A. We know x = 9k but we do not know anything abt y and z..may be they are non integers or decimals.
Not sufficient
B. Nothing known abt x Not sufficient
By combining we know that each is an integer and x is always divided by 3.
Posted from my mobile device
My take.
A. We know x = 9k but we do not know anything abt y and z..may be they are non integers or decimals.
Not sufficient
B. Nothing known abt x Not sufficient
By combining we know that each is an integer and x is always divided by 3.
Posted from my mobile device
Incorrect answer choice is marked in my opinion.
Edit : didn't consider that y and z are not necessarily integers,
Therefore C is correct.
Thanks Bunuel!
Edit : didn't consider that y and z are not necessarily integers,
Therefore C is correct.
Thanks Bunuel!
