Events & Promotions
|
|
GMAT Club Daily Prep
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
11 Oct 2019, 02:13
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
82% (01:22) correct
18%
(01:07)
wrong
based on 88
sessions
History
Date
Time
Result
Not Attempted Yet
If \(-\frac{3}{4}x + 3y - \frac{1}{2} = \frac{3}{2}y - \frac{1}{4}x\), what is the value x?
(1) \(y^2 = 4\)
(2) \(y = 2\)
(1) \(y^2 = 4\)
(2) \(y = 2\)
Archit3110
Major Poster
11 Oct 2019, 03:54
Kudos
Bookmarks
Bunuel
simplify \(-\frac{3}{4}x + 3y - \frac{1}{2} = \frac{3}{2}y - \frac{1}{4}x\)
we get
3y-1=x
#1
y=+/-2
insufficient
#2
y=2 so x=5
sufficient
IMO B
11 Oct 2019, 10:22
Kudos
Bookmarks
Bunuel
Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.
Visit https://www.mathrevolution.com/gmat/lesson for details.
The first step of the VA (Variable Approach) method is to modify the original condition and the question. We then recheck the question. We should simplify conditions if necessary.
\(-\frac{3}{4}x+3y-\frac{1}{2} = \frac{3}{2}y-\frac{1}{4}x\)
⇔ \(-3x+12y-2=6y-x\)
⇔ \(2x=6y-2\)
⇔ \(x=3y-1\)
Since we have 2 variables (x and y) and 1 equations, D is most likely to be the answer. So, we should consider each condition on its own first.
Condition 1)
If \(y = 2\), then we have \(x = 2 \cdot 3-1 = 5\).
If \(y = -2\), then we have \(x = (-2) \cdot 3-1 = -7\).
Since condition 1) does not yield a unique solution, it is not sufficient.
Condition 2)
If \(y = 2\), then we have \(x = 2 \cdot 3-1 = 5\).
Since condition 2) yields a unique solution, it is sufficient.
Therefore, B is the answer.
If the original condition includes “1 variable”, or “2 variables and 1 equation”, or “3 variables and 2 equations” etc., one more equation is required to answer the question. If each of conditions 1) and 2) provide an additional equation, there is a 59% chance that D is the answer, a 38% chance that A or B is the answer, and a 3% chance that the answer is C or E. Thus, answer D (conditions 1) and 2), when applied separately, are sufficient to answer the question) is most likely, but there may be cases where the answer is A,B,C or E.
