|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Updated on: Oct 15, 2013 4:36 pm
Originally posted by Schawjibb on Apr 29, 2011 2:21 pm.
Last edited by Bunuel on Oct 15, 2013 4:36 pm, edited 1 time in total.
Last edited by Bunuel on Oct 15, 2013 4:36 pm, edited 1 time in total.
Renamed the topic and edited the question.
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
76% (00:51) correct
24%
(01:09)
wrong
based on 217
sessions
History
Date
Time
Result
Not Attempted Yet
Does x = y?
(1) x^2 - y^2 = 0
(2) (x - y)^2 = 0
(1) x^2 - y^2 = 0
(2) (x - y)^2 = 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
Apr 29, 2011 3:01 pm
Kudos
Bookmarks
1. Not sufficient
x^2 = y^2
But that doesnt mean x = y.
x can be y or x can be -y
2. Sufficient
x = y is only solution that can satisfy (x-y)^2=0.
My answer is B.
Posted from my mobile device
x^2 = y^2
But that doesnt mean x = y.
x can be y or x can be -y
2. Sufficient
x = y is only solution that can satisfy (x-y)^2=0.
My answer is B.
Posted from my mobile device
Jun 23, 2017 3:10 pm
Kudos
Bookmarks
Does x = y?
(1) \(x^2-y^2=0\)
(x - y)(x + y) = 0. So, x = y or x = -y. Not sufficient.
Or: x^2 = y^2.
|x| = |y|. The same here: x = y or x = -y. Not sufficient.
(2) \((x-y)^2=0\) --> x- y = 0 --> x = y. Sufficient.
Answer: B.
(1) \(x^2-y^2=0\)
(x - y)(x + y) = 0. So, x = y or x = -y. Not sufficient.
Or: x^2 = y^2.
|x| = |y|. The same here: x = y or x = -y. Not sufficient.
(2) \((x-y)^2=0\) --> x- y = 0 --> x = y. Sufficient.
Answer: B.
