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

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Rock750
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If the square root of t is a real number, is the square root [#permalink] New post   09 Apr 2013, 16:32
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27% (01:25) correct 73% (01:07) wrong based on 26 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

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Re: If the square root of t is a real number, is the square root [#permalink] New post   10 Apr 2013, 01:12
Expert Reply
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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Re: If the square root of t is a real number, is the square root [#permalink] New post   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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Re: If the square root of t is a real number, is the square root [#permalink] New post   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:
https://www.manhattanprep.com/gmat/blog ... -the-gmat/

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Re: If the square root of t is a real number, is the square root [#permalink]
29 Nov 2014, 17:16
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