Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Re: Is x negative? [#permalink]
02 Jun 2013, 03:45

1

This post received KUDOS

Is x negative?

(i) x^2 is a positive number \(x^2>0\), so \(x\neq{0}\), not sufficient to say that it is negative.

(ii) x * |y| is not a positive number \(x*|y|\leq{0}\), so y could be 0 and x could have any value (positive, negative, or zero) and this would be respected Not sufficient.

1+2)Still y could be 0, and in this case x, which now we know cannot be zero, could still equal a positive or negative number. Example \(2*0\leq{0}\) this respects both conditions and x is positive, or \(-2*0\leq{0}\) here x is negative. Not sufficient E _________________

It is beyond a doubt that all our knowledge that begins with experience.

Re: Is x negative? [#permalink]
02 Jun 2013, 04:01

Zarrolou wrote:

Is x negative?

(i) x^2 is a positive number \(x^2>0\), so \(x\neq{0}\), not sufficient to say that it is negative.

(ii) x * |y| is not a positive number \(x*|y|\leq{0}\), so y could be 0 and x could have any value (positive, negative, or zero) and this would be respected Not sufficient.

1+2)Still y could be 0, and in this case x, which now we know cannot be zero, could still equal a positive or negative number. Example \(2*0\leq{0}\) this respects both conditions and x is positive, or \(-2*0\leq{0}\) here x is negative. Not sufficient E

Hi Zarrolou, I thought mod of Zero was illegal. in (ii) x could be zero. But together we know x cannot be zero hence negative. _________________

Re: Is x negative? [#permalink]
02 Jun 2013, 04:06

Expert's post

summer101 wrote:

Zarrolou wrote:

Is x negative?

(i) x^2 is a positive number \(x^2>0\), so \(x\neq{0}\), not sufficient to say that it is negative.

(ii) x * |y| is not a positive number \(x*|y|\leq{0}\), so y could be 0 and x could have any value (positive, negative, or zero) and this would be respected Not sufficient.

1+2)Still y could be 0, and in this case x, which now we know cannot be zero, could still equal a positive or negative number. Example \(2*0\leq{0}\) this respects both conditions and x is positive, or \(-2*0\leq{0}\) here x is negative. Not sufficient E

Hi Zarrolou, I thought mod of Zero was illegal. in (ii) x could be zero. But together we know x cannot be zero hence negative.

\

|0|=0.

Is x negative?

(1) x^2 is a positive number. This statement implies that \(x\neq{0}\). Not sufficient.

(2) x * |y| is not a positive number --> \(x * |y|\leq{0}\). If \(y=0\), then \(x\) could be ANY number. Not sufficient.

(1)+(2) Again, if \(y=0\), then \(x\) could be ANY number but 0 (excluded because of the first statement). Not sufficient.

Re: Is x negative? [#permalink]
30 Jun 2013, 13:25

Is x negative?

(1) x^2 is a positive number

x^2 = + |x| = + x could be any number aside from zero and |x| will be positive. x = positive or negative INSUFFICIENT

(2) x * |y| is not a positive number |y| will always be a positive number so for x * |y| to be negative x must be negative. HOWEVER, the answer could be zero too. 0 is not positive or negative. So, 0 * |y| = 0 OR x * |0| = 0. x = positive, zero or negative INSUFFICIENT

1+2) # 1 tells us that x could be positive or negative. # 2 tells us that c could be positive, negative or zero. In other words, x could be positive or negative. INSUFFICIENT

Re: Is x negative? [#permalink]
24 Jul 2014, 05:49

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. _________________

On September 6, 2015, I started my MBA journey at London Business School. I took some pictures on my way from the airport to school, and uploaded them on...

When I was growing up, I read a story about a piccolo player. A master orchestra conductor came to town and he decided to practice with the largest orchestra...

Last week, hundreds of first-year and second-year students traversed the globe as part of KWEST: Kellogg Worldwide Experience and Service Trip. Kyle Burr, one of the student-run KWEST executive...