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rahul16singh28
Joined: 31 Jul 2017
Last visit: 09 Jun 2020
Posts: 428
Given Kudos: 752
Location: Malaysia
Schools: INSEAD Jan '19
GPA: 3.95
WE:Consulting (Energy)
10 Sep 2018, 21:10
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D
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:
67% (01:04) correct
33%
(01:28)
wrong
based on 90
sessions
History
Date
Time
Result
Not Attempted Yet
Is xy < 0?
(1) 4|x| + 2|y| = 0
(2) 7|x| + 5|y| = 0
(1) 4|x| + 2|y| = 0
(2) 7|x| + 5|y| = 0
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
10 Sep 2018, 21:18
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rahul16singh28
Is xy < 0?
(1) 4|x| + 2|y| = 0. Since absolute value is always non-negative then we have that the sum of two non-negative values (4|x| and 2|y|) is zero, which is only possible if each is zero --> x=y=0 --> xy=0. Sufficient.
(2) 7|x| + 5|y| = 0. The same here. Sufficient.
Answer: D.
10 Sep 2018, 21:24
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Is xy < 0?
(1) 4|x| + 2|y| = 0
4|X|=-2|y|..
All values are positive so 4|X| cannot be negative..
Only possibility is it is 0, thus both X and y are 0 and xy=0....
Ans ..No
Sufficient
(2) 7|x| + 5|y| = 0
Same as above..
Sufficient
D
(1) 4|x| + 2|y| = 0
4|X|=-2|y|..
All values are positive so 4|X| cannot be negative..
Only possibility is it is 0, thus both X and y are 0 and xy=0....
Ans ..No
Sufficient
(2) 7|x| + 5|y| = 0
Same as above..
Sufficient
D
