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:
Re: Which does a rancher have a greater number of, cows or [#permalink]
09 Apr 2013, 07:07
Tip: Don't try to manipulate inequalities yet. Leave the C (cows) and S (sheep) as they are in equality form (i.e. don't move a number over and do it to the other side). It's a hard habit to break when you're used to algebra and solving but it will save you time if you don't waste it on unnecessary note taking. Remember, data sufficiency is about seeing if you can solve, don't try to solve. Just read each option aloud to yourself and compare. Remember the goal of the question, which is a greater number, cows or sheep?
Option A: Says C < 5S. Pick a number; make the number of sheep equal to 100, S = 100. Plug in the 100 to see the numbers available to make C less than 5S or 500 sheep, 100*5. C could be any number less than 500. It could be 1 cow or 499 cows versus the 100 sheep you started with. Not enough information.
Option B: Says 1/5 * S < C. Again use 100 as your baseline for the number of sheep (S) to make it comparable to option A. 1/5 of S is 20 (1/5 * 100), therefore 20 < C. With this option, the rancher has more than 20 cows, 20 < C. Draw a number line and look to see if you can have more than one answer. If so you don't have enough information to give a definitive answer. The cow count can be 21, less than 100 sheep, or it could be 1 million cows, more than 100 sheep. Not enough information.
Option C: Combine the options together. You know have a number line for the ranges of C. C is greater than 20 but less than 500, or 20 < C < 500. Use the 100 sheep as your baseline again. C can either be 21 cows and 499 cows and either number can satisfy the number line. Combining options makes it still uncertain as to which animal the rancher has more of. Not enough information.
Option D: Neither A nor B can be used to answer the question.
Option E: Your answer. Not enough information given in this question to answer.
With practice you'll recognize how to solve data sufficiently problems faster and faster. You have what it takes to conquer the GMAT!)
gmatclubot
Re: Which does a rancher have a greater number of, cows or
[#permalink]
09 Apr 2013, 07:07
As I’m halfway through my second year now, graduation is now rapidly approaching. I’ve neglected this blog in the last year, mainly because I felt I didn’...
Perhaps known best for its men’s basketball team – winners of five national championships, including last year’s – Duke University is also home to an elite full-time MBA...
Hilary Term has only started and we can feel the heat already. The two weeks have been packed with activities and submissions, giving a peek into what will follow...