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Updated on: 30 Jun 2019, 03:57
Originally posted by GMATBusters on 29 Jun 2019, 20:23.
Last edited by Bunuel on 30 Jun 2019, 03:57, edited 1 time in total.
Last edited by Bunuel on 30 Jun 2019, 03:57, edited 1 time in total.
Renamed the topic.
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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:
35%
(medium)
Question Stats:
63% (01:14) correct
37%
(01:17)
wrong
based on 134
sessions
History
Date
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Not Attempted Yet
If \(y ≠ 0\), is x = -1 ?
(1) \(x = \frac{y}{|y|}\)
(2) \(|x| = -x\)
GMATBuster's Collection
(1) \(x = \frac{y}{|y|}\)
(2) \(|x| = -x\)
GMATBuster's Collection
utkarshg97
Joined: 26 Jun 2019
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29 Jun 2019, 22:11
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So, the question starts with two variables, x and y both of which don't have any numerical value attached to them. Only y cannot be 0.
Solving for 1.
X = y/mod(y)
Now if y is positive answer is 1
If y is negative answer would be - 1
Hence not sufficient.
Solving for 2.
Here mod(x) = - (x) is only possible when x is any negative number.
It's proven that x is negatice but not - 1, it could be any negative number.
Hence not sufficient.
Now solving for both together, we get that x can only be 1 or - 1 from the first statement and that x can only be negative from second.
Which means x can only be - 1.
We have our answer, C
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Solving for 1.
X = y/mod(y)
Now if y is positive answer is 1
If y is negative answer would be - 1
Hence not sufficient.
Solving for 2.
Here mod(x) = - (x) is only possible when x is any negative number.
It's proven that x is negatice but not - 1, it could be any negative number.
Hence not sufficient.
Now solving for both together, we get that x can only be 1 or - 1 from the first statement and that x can only be negative from second.
Which means x can only be - 1.
We have our answer, C
_____________________
Please give kudos if you liked the answer!
Posted from my mobile device
29 Jun 2019, 22:56
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IMO A
x = y/|y|
when y <0 , we get x = 1
when y y>0 , we get x = 1
so clear anser No
sufficient
statement 2 says x <0 , but can be be anything
so not sufficient
IMO A
Posted from my mobile device
x = y/|y|
when y <0 , we get x = 1
when y y>0 , we get x = 1
so clear anser No
sufficient
statement 2 says x <0 , but can be be anything
so not sufficient
IMO A
Posted from my mobile device
