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# If the square root of t is a real number, is the square root

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Senior Manager
Status: Final Lap
Joined: 25 Oct 2012
Posts: 282

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Concentration: General Management, Entrepreneurship
GPA: 3.54
WE: Project Management (Retail Banking)
If the square root of t is a real number, is the square root [#permalink]

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09 Apr 2013, 16:32
00:00

Difficulty:

85% (hard)

Question Stats:

31% (00:49) correct 69% (00:53) wrong based on 32 sessions

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If the square root of t is a real number, is the square root of t positive?

(1) t > 0
(2) t^2 > 0
[Reveal] Spoiler: OA

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Math Expert
Joined: 02 Sep 2009
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Re: If the square root of t is a real number, is the square root [#permalink]

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10 Apr 2013, 01:12
Rock750 wrote:
If the square root of t is a real number, is the square root of t positive?

(1) t > 0
(2) t^2 > 0

I wouldn't worry about this question at all since it deals with a subtle difference between writing "the square root of t" and "$$\sqrt{t}$$". You won't see such question on the real test.
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Intern
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Location: India
Concentration: Finance, Technology
GPA: 3.5
WE: Programming (Telecommunications)
Re: If the square root of t is a real number, is the square root [#permalink]

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10 Apr 2013, 01:26
1. t is positive. Square root of t can be either positive or negative. Not sufficient.
2.$$t^2$$ is positive and square root of t is a real number.So t should be positive and square root of t can be positive or negative.
Not sufficient.

Combining both statements,we can not proceed further.

Ans : Option E.
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Current Student
Joined: 02 Apr 2012
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If the square root of t is a real number, is the square root [#permalink]

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29 Nov 2014, 17:16
I saw this same question in a Mc Graw Hill book and still I do not fully understand, because Official Guide says that we must consider only the positive root.
Here is an explanation from Manhattan GMAT:
http://www.manhattanprep.com/gmat/blog/ ... -the-gmat/
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If the square root of t is a real number, is the square root   [#permalink] 29 Nov 2014, 17:16
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