December 13, 2018 December 13, 2018 08:00 AM PST 09:00 AM PST What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL. December 14, 2018 December 14, 2018 09:00 AM PST 10:00 AM PST 10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.
Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51121

Is x between 0 and 1?
[#permalink]
Show Tags
06 Feb 2014, 00:16
Question Stats:
81% (00:54) correct 19% (01:06) wrong based on 478 sessions
HideShow timer Statistics



Math Expert
Joined: 02 Sep 2009
Posts: 51121

Re: Is x between 0 and 1?
[#permalink]
Show Tags
06 Feb 2014, 00:16



Director
Joined: 25 Apr 2012
Posts: 684
Location: India
GPA: 3.21
WE: Business Development (Other)

Re: Is x between 0 and 1?
[#permalink]
Show Tags
06 Feb 2014, 10:58
Is x between 0 and 1? (1) x^2 is less than x. (2) x^3 is positive. St1: x>x^2> x(1x)>0 So either x>0 and 1x>0 or 1>x and thus 0 x<0 or 1x<0 or x>1...this is not possible cause we said x<0 so st1 alone is sufficent
St2: x^3 is positive...well there are many options like x=2 and x^3=8 or x=1/2 and x^3=1/8
So ans is A
Difficulty level 600 is okay
Posted from my mobile device
_________________
“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”



Intern
Joined: 01 Aug 2006
Posts: 33

Re: Is x between 0 and 1?
[#permalink]
Show Tags
07 Feb 2014, 18:12
Is x between 0 and 1? > is 0 < x < 1?
(1) x^2 is less than x > only possible for values between 0 and 1. (if x < 0, x^2 always > x; if x > 1, x^2 always > x). (2) x^3 is positive > example: x = 2 or 1/2, Not sufficient.
A.



Math Expert
Joined: 02 Sep 2009
Posts: 51121

Re: Is x between 0 and 1?
[#permalink]
Show Tags
08 Feb 2014, 04:55



Retired Moderator
Joined: 29 Oct 2013
Posts: 260
Concentration: Finance
GPA: 3.7
WE: Corporate Finance (Retail Banking)

Re: Is x between 0 and 1?
[#permalink]
Show Tags
23 May 2014, 06:45
Hi Bunuel, Just a small typo here. This is question number 76 on page#189 in OG Quant Review and not 71 as you mention here. thanks
_________________
Please contact me for super inexpensive quality private tutoring
My journey V46 and 750 > http://gmatclub.com/forum/myjourneyto46onverbal750overall171722.html#p1367876



Math Expert
Joined: 02 Sep 2009
Posts: 51121

Re: Is x between 0 and 1?
[#permalink]
Show Tags
23 May 2014, 09:11



Retired Moderator
Joined: 29 Oct 2013
Posts: 260
Concentration: Finance
GPA: 3.7
WE: Corporate Finance (Retail Banking)

Re: Is x between 0 and 1?
[#permalink]
Show Tags
23 May 2014, 09:29
Great! yup youre right about the page no.
_________________
Please contact me for super inexpensive quality private tutoring
My journey V46 and 750 > http://gmatclub.com/forum/myjourneyto46onverbal750overall171722.html#p1367876



Director
Joined: 10 Mar 2013
Posts: 504
Location: Germany
Concentration: Finance, Entrepreneurship
GPA: 3.88
WE: Information Technology (Consulting)

Re: Is x between 0 and 1?
[#permalink]
Show Tags
03 May 2015, 12:01
No need to talk why B is wrong. A) If X^2 < X it means that 0<X<1, X can not be negative > 2^2 isalways > 2, so X is positive. And a positive X^2 can ONLY be smaller than X if its range is between 0 and 1. It's actually a property of a normal fraction that X^2 < X (see MGMAT)
_________________
When you’re up, your friends know who you are. When you’re down, you know who your friends are.
Share some Kudos, if my posts help you. Thank you !
800Score ONLY QUANT CAT1 51, CAT2 50, CAT3 50 GMAT PREP 670 MGMAT CAT 630 KAPLAN CAT 660



eGMAT Representative
Joined: 04 Jan 2015
Posts: 2291

Re: Is x between 0 and 1?
[#permalink]
Show Tags
06 May 2015, 01:28
Hi All, We can also solve this question using the Wavy Line method. Given:We are asked if \(0< x <1\). For finding the range of \(x\), we need to solve the inequality given in the statements. StatementI:StI tells us that \(x^2 < x\) i.e. \(x(x 1) < 0\). Let's find the range of this inequality using the Wavy Line method. The zero points of this inequality are {1,0}. Plotting them on the number line using the Wavy Line method we see that the inequality is negative for the range \(0 < x < 1\). Hence, statementI is sufficient to answer the question. StatementII:StII tells us that \(x^3 > 0\). Let's draw a Wavy line for this inequality. The zero point of the inequality is {0} Plotting it on the number line we see that the inequality is positive for the range \(x > 0\). Thus, we can't say for sure if \(0 < x < 1\). Hence, statementII is not sufficient to answer the question. For more reading on the Wavy Line method try out inequalitiestrick9148280.html#p1465609Hope its clear! Regards Harsh
_________________
Register for free sessions Number Properties  Algebra Quant Workshop
Success Stories Guillermo's Success Story  Carrie's Success Story
Ace GMAT quant Articles and Question to reach Q51  Question of the week
Must Read Articles Number Properties – Even Odd  LCM GCD  Statistics1  Statistics2  Remainders1  Remainders2 Word Problems – Percentage 1  Percentage 2  Time and Work 1  Time and Work 2  Time, Speed and Distance 1  Time, Speed and Distance 2 Advanced Topics Permutation and Combination 1  Permutation and Combination 2  Permutation and Combination 3  Probability Geometry Triangles 1  Triangles 2  Triangles 3  Common Mistakes in Geometry Algebra Wavy line  Inequalities Practice Questions Number Properties 1  Number Properties 2  Algebra 1  Geometry  Prime Numbers  Absolute value equations  Sets
 '4 out of Top 5' Instructors on gmatclub  70 point improvement guarantee  www.egmat.com



Senior Manager
Joined: 02 Jan 2017
Posts: 310
Location: Canada

Re: Is x between 0 and 1?
[#permalink]
Show Tags
14 Jan 2017, 05:29
x^2 is less than x > only possible values between 0 and 1. (2) x^3 is positive > exp: x = 1 or 2 or 1/2 or 1/3 Not sufficient.
ans is A



NonHuman User
Joined: 09 Sep 2013
Posts: 9143

Re: Is x between 0 and 1?
[#permalink]
Show Tags
10 Aug 2018, 17:41
Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up  doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources




Re: Is x between 0 and 1? &nbs
[#permalink]
10 Aug 2018, 17:41






