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 500,000 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:

This is a typical GMAT type question that you can expect...

For such questions remember to consider: 1. Values <-1 2. -1 < Values < 0 3. 0 < Values < 1 4. 1 < Values [color=#0000ff]And you will never get such questions wrong !![/color]

Option1: The values differ when T,W are +VE and when they are -VE

Option 2: This is a TRAP. All those who will substitute value of 't' and and cancel out the terms on LHS & RHS - WILL GET THIS WRONG. You can cancel the terms ONLY if they are positive.

Combinig 1 & 2, We are left with only +ve values. For which the given equation is always consistent. Hence C.

S1 - No idea about the sigh of t & w - Insufficient

S2 - Again no idea about the sigh of t & w - Insufficient

Combining - (and using another concept - NEVER cancel the variables on both sides of equality/ inequality) the statements - we know t>w and w>0 so, C is the answer. _________________

Statement1 : t > w. We dont know if the numbers are positive or negative . Anyhow lets check both the cases. If, t = 4 and w = 2. Since a>0, here \(t^{a} > w^{a}\). But, if t = -2, w = -4. Then t > w.Then for a=3, \(t^{a} > w^{a}\) and for a=2, \(t^{a} < w^{a}\). Therefore, Insufficient.

Statement2 : t=2w. If t = -4, w = -2. Then t = 2w. Then for a=3, \(t^{a} < w^{a}\) and for a=2, \(t^{a} > w^{a}\). Therefore, Insufficient.

Combined : We know that t and w can only be positive. Therefore, \(t^{a} > w^{a}\) holds for all possible values. Sufficient.

Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and equations ensures a solution.

If a > 0, is t^a > w^a ?

(1) t > w (2) t = 2w

In the original condition there are 3 variables (a,t,w), and 1 equation (a>0) thus in order to match the number of variables and equations we need 2 equations more. Since there is 1 each i 1) and 2), C is likely the answer. In actual calculation, using both 1) & 2) we get t=2w>w--> w>0, t>0 thus the answer is yes and the conditions are sufficient. therefore the answer is C _________________

Post your Blog on GMATClub We would like to invite all applicants who are applying to BSchools this year and are documenting their application experiences on their blogs to...

HBS alum talks about effective altruism and founding and ultimately closing MBAs Across America at TED: Casey Gerald speaks at TED2016 – Dream, February 15-19, 2016, Vancouver Convention Center...