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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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24 Sep 2013, 02:35
Bunuel wrote: stne wrote: udaymathapati wrote: If x#0, is x/x<1?
(1) x < 1 (2) x > −1 I think\(\frac{x}{x} <1\) (1) x < 1 (2) x > −1 Here the answer should be E x= 1/2 satisfies both the statements and answer to the stem is no, 1 is not less 1 X=  1/2 satisfies both the statements and answer to the stem is yes , 1<1 but for question \(\frac{x^2}{x} <1\) (1) x < 1 (2) x > −1 here the answer is C as shown above Please do correct if I am missing something thanks. If it were: If x#0, is x/x<1?
(1) x < 1 (2) x > −1Then the answer is E. The question basically asks whether x is negative and we cannot answer that even when we combine the statements given. If it were: If x#0, is x^2/x<1?
(1) x < 1 (2) x > −1Then the answer is C. The question basically asks whether x<0 or 0<x<1. When we combine the statements, we get that 1<x<1 (x#0). So, the answer to the question is YES. as you can see the question has now been corrected originally udaymathapati had changed x^2 to x and posted the question where is my kudo for pointing this out ?
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Re: If x 0, is x^2 / x < 1? [#permalink]
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10 Oct 2013, 06:48
Bunuel wrote: zaarathelab wrote: If x ≠ 0, is x^2 / x < 1? (1) x < 1 (2) x > −1
We can safely reduce LHS of inequality \(\frac{x^2}{x}<1\) by \(x\). We'll get: is \(x<1\)? Basically question asks whether \(x\) is in the range \(1<x<1\). Statements 1 and 2 are not sufficient, but together they are defining the range for \(x\) as \(1<x<1\). Answer: C.How do you get that \(x<1\)?



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Re: If x 0, is x^2 / x < 1? [#permalink]
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10 Oct 2013, 07:15



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Re: If x 0, is x^2/x < 1? [#permalink]
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28 Feb 2014, 17:58
Hey Bunuel, Can you please elaborate how you reduced the lefthand side to x < 1? I'm getting confused because of the absolute value sign.



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Re: If x 0, is x^2/x < 1? [#permalink]
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01 Mar 2014, 03:46



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Re: If x 0, is x^2/x < 1? [#permalink]
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01 Mar 2014, 12:21
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This post received KUDOS
Oh yes...so silly of me! If \sqrt{(x^2)} = x, x^2 = x*x Thanks a lot Bunuel for your prompt help!:)



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Re: If x 0, is x^2/x < 1? [#permalink]
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01 Mar 2014, 12:49
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msand wrote: If x ≠ 0, is x^2/x < 1?
(1) x < 1 (2) x > 1 Another way i would look at this is : x^2 is always positive, x is always positive too .. so a square value divided by the same number would only be less than 1 if the number was a proper fraction instead of an integer .. so the question is asking is x between 1 and 1 or x < 1 ?



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Re: If x 0, is x^2 / x < 1? [#permalink]
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09 Jun 2015, 23:13
Hi All, This question is loaded with Number Property rules. If you know the rules, then you can make relatively quick work of this question; you can also solve it by TESTing VALUES... We're told that X ≠ 0. We're asked if (X^2) /(X) < 1. This is a YES/NO question. Before dealing with the two Facts, I want to point out a couple of Number Properties in the question stem: 1) X^2 will either be 0 or positive. 2) X will either be 0 or positive. 3) For the fraction in the question to be LESS than 1, X^2 must be LESS than X. Fact 1: X < 1 IF... X = 1/2 (1/4)/1/2 = 1/2 and the answer to the question is YES IF... X = 1 (1)/1 = 1 and the answer to the question is NO Fact 1 is INSUFFICIENT Fact 2: X > −1 IF... X = 1/2 (1/4)/1/2 = 1/2 and the answer to the question is YES IF... X = 1 (1)/1 = 1 and the answer to the question is NO Fact 2 is INSUFFICIENT Combined, we know... 1 < X < 1 Since X cannot equal 0, X must be a FRACTION (either negative or positive). In ALL cases, X^2 will be LESS than X, so the fraction will ALWAYS be less than 1 and the answer to the question is ALWAYS YES. Combined, SUFFICIENT Final Answer: GMAT assassins aren't born, they're made, Rich
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Re: If x 0, is x^2/x < 1? [#permalink]
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13 Mar 2016, 06:05
Here from the question statement x^2/x >1 => the question is actually asking us that does x lies in the (1,1) range as you can well see that the combination statement works. Hence C
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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 11:32
Why can't we manipulate the question to get is x^2<x ? can't we pass the x to the right? It says in the stem that it's #0. Am i wrong here?



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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 11:39



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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 14:57
thank you for the reply!
Does this mean that the notation x#0 in the question stem doesn't tell anything new? it's already known from the rules that the divisor can't be zero. So if you look at the stem wihtout the x#0 information, the question doesn't change.
Anyways, because whe know that divisor is not zero, we know that x<0 or x>0 and since it's an absolute value, it must be x>0. Is this correct?
Ps. does it mean that in a question where it is mentioned that X#0 but the denominator is not a module, we still must somewhow be sure of the sign of the denominator to be able to multiply like in the case of say, x^2\x so X in both, numerator and denomiator?
Last edited by iliavko on 26 Mar 2016, 15:13, edited 1 time in total.



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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 15:06
iliavko wrote: thank you for the reply!
Does this mean that the notation x=0 in the question stem doesn't tell anything new? it's already known from the rules that the divisor can't be zero. So if you look at the stem wihtout the x=0 information, the question doesn't change.
Anyways, because whe know that divisor is not zero, we know that x<0 or x>0 and since it's an absolute value, it must be x>0. Is this correct? Division by 0 is not allowed so \(x \neq 0\) rules out this case. If we were not told that, then when considering the two statements together we were not be able to tell whether \(\frac{x^2}{x}<1\) because if x= 0 then \(\frac{x^2}{x}\) is undefined not less than 1. Hope it's clear.
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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 15:24
Thank you for the replies!
Sorry, but something is still not 100% clear to me, so the meaning of "undefined" is not like "can't possibly be done, so don't even consider it" but more like a valid answer? Isn't undefined a sort of a dead end? Or is it just "correct" to write X#0 with no particular practical reason?



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Re: If x ≠ 0, is x^2/x < 1? [#permalink]
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26 Mar 2016, 15:39
iliavko wrote: Thank you for the replies!
Sorry, but something is still not 100% clear to me, so the meaning of "undefined" is not like "can't possibly be done, so don't even consider it" but more like a valid answer? Isn't undefined a sort of a dead end? Or is it just "correct" to write X#0 with no particular practical reason? The question asks: is x^2/x < 1 if 1 < x < 1. Now, if x is any number but 0 from 1 to 1, then the answer is YES. But if x is 0, then we cannot answer the question, because if x = 0 , then x^2/x is undefined.
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Re: If x 0, is x^2/x < 1? [#permalink]
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21 Jun 2017, 14:19
Is x^2/x < 1? Which means  is lxl < 1? or 1 < x < 1? (1) x < 1 ======> Not Sufficient(2) x > 1 ======> Not SufficientCombining we get: 1 < x < 1 Hence, answer is C
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