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:

st 1 says 1/(k-1)>0 that means k-1>0 that means k>1 that means k is +ve and thus 1/k>0 ... suff

st2 says 1/(k+1) >0 that means k+1>0 i.e k>-1 that means k can -ve fraction or k is positive . if k is -neg fraction 1/k <0 and if k is +ve 1/k >0 so insuff

Hi Guys,
The OA is A. Can anybody explain how did thi answer come??

As per the solutions given by folks since one says 1/(k-1) >0 it implies k-1 <0 or k<1 therefore K maybe greater that 0 0r less than 0. SO how come the correct answer is A in GMAT PREP.

Hi Guys, The OA is A. Can anybody explain how did thi answer come??

As per the solutions given by folks since one says 1/(k-1) >0 it implies k-1 <0 or k<1 therefore K maybe greater that 0 0r less than 0. SO how come the correct answer is A in GMAT PREP.

fig is this right or wrong why we did it your way?? eg: 1/x< 5 thus x>1/5

but if

1/x <0 we cant say x>1/0 because it is not defined ......right or wrong

Yes don't use the flip sign method when you have zero on the right side. In stead, think this way. For a product or ratio of two numbers to be positive, the two numbers have to have the same sign; for the product or ratio to be negative, the two numbers must have different signs. _________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

Type of Visa: You will be applying for a Non-Immigrant F-1 (Student) US Visa. Applying for a Visa: Create an account on: https://cgifederal.secure.force.com/?language=Englishcountry=India Complete...