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04 May 2013, 01:50
Kudos
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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:
15%
(low)
Question Stats:
79% (00:50) correct
21%
(00:53)
wrong
based on 316
sessions
History
Date
Time
Result
Not Attempted Yet
Is h^2 = h ?
(1) h + h = h
(2) h – h = h
(1) h + h = h
(2) h – h = h
Solving this question helps.
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is even better.
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
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04 May 2013, 01:53
Kudos
Bookmarks
Is h^2 = h ?
The question is: is \(h=0\) or \(h=1\)?
(1) h + h = h
So \(h=0\) Sufficient
(2) h – h = h
So \(-h=0\) , \(h=0\) Sufficient
D
The question is: is \(h=0\) or \(h=1\)?
(1) h + h = h
So \(h=0\) Sufficient
(2) h – h = h
So \(-h=0\) , \(h=0\) Sufficient
D
04 May 2013, 07:10
Kudos
Bookmarks
Is h^2 = h ?
Is \(h^2 = h\)? --> is \(h^2 - h =0\)? --> is \(h(h-1)=0\)? --> is \(h=0\) or \(h=1\)?
(1) h + h = h --> 2h=h --> h=0. Sufficient.
(2) h – h = h --> 0=h. Sufficient.
Answer: D.
Hope it's clear.
Is \(h^2 = h\)? --> is \(h^2 - h =0\)? --> is \(h(h-1)=0\)? --> is \(h=0\) or \(h=1\)?
(1) h + h = h --> 2h=h --> h=0. Sufficient.
(2) h – h = h --> 0=h. Sufficient.
Answer: D.
Hope it's clear.
