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 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.
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 2912:30 AM EDT
-01:30 AM EDT
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Apr 3001:30 AM EDT
-02:30 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.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
May 0306:30 AM PDT
-08:30 AM PDT
Verbal trouble on GMAT? Fix it NOW! Join Sunita Singhvi for a focused webinar on actionable strategies to boost your Verbal score and take your performance to the next level.
JusTLucK04
GMAT 1: 730 Q51 V38
Posts: 270
18 Dec 2014, 08:00
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:44) correct
30%
(01:57)
wrong
based on 656
sessions
History
Date
Time
Result
Not Attempted Yet
24 Dec 2014, 09:54
Kudos
Bookmarks
Hi JusTLucK04,
The explanations in this thread both nicely explain the solution to this problem, so I won't rehash any of that here.
Instead, I want to point out that GMAT writers tend to hide Number Property patterns into the DS questions that you'll see on Test Day. Sometimes the Number Property patterns are fairly simple and obvious (odd numbers vs. even numbers, positives vs. negatives, etc.), but sometimes the patterns are rarer.
Here, we're told that X and Y are both integers and we're asked if X^Y = Y^X?
Just thinking about THAT question, there cannot be that many situations in which the two terms are equal to one another. Thinking about that, I can only come up 2 immediate possibilities and one that's a little tougher to spot:
X and Y
1) are the same number
2) one is 2 and the other is 4
The rarer one
3) one is -2 and the other is -4
Since those 3 options generate a "YES" answer, you can now look for those possibilities in the two Facts (knowing that most of the values you'd TEST randomly will generate a "NO" answer). That slight "time investment" in thinking about what the question specifically asks for can save you some serious time later on while you're working through the rest of the question.
GMAT assassins aren't born, they're made,
Rich
The explanations in this thread both nicely explain the solution to this problem, so I won't rehash any of that here.
Instead, I want to point out that GMAT writers tend to hide Number Property patterns into the DS questions that you'll see on Test Day. Sometimes the Number Property patterns are fairly simple and obvious (odd numbers vs. even numbers, positives vs. negatives, etc.), but sometimes the patterns are rarer.
Here, we're told that X and Y are both integers and we're asked if X^Y = Y^X?
Just thinking about THAT question, there cannot be that many situations in which the two terms are equal to one another. Thinking about that, I can only come up 2 immediate possibilities and one that's a little tougher to spot:
X and Y
1) are the same number
2) one is 2 and the other is 4
The rarer one
3) one is -2 and the other is -4
Since those 3 options generate a "YES" answer, you can now look for those possibilities in the two Facts (knowing that most of the values you'd TEST randomly will generate a "NO" answer). That slight "time investment" in thinking about what the question specifically asks for can save you some serious time later on while you're working through the rest of the question.
GMAT assassins aren't born, they're made,
Rich
General Discussion
18 Dec 2014, 08:09
Kudos
Bookmarks
If x and y are integers, is x^y = y^x?
(1) x – y = 2. If x=3 and y=2, then the answer is NO but if x=4 and y=2, then the answer is YES. Not sufficient.
(2) xy = 8. If x=8 and y=1, then the answer is NO but if x=4 and y=2, then the answer is YES. Not sufficient.
(1)+(2) Solving x – y = 2 and xy = 8 gives two sets of solutions: (x, y) = (4, 2) and (x, y) = (-2, -4). For both x^y = y^x. Sufficient.
Answer: C.
(1) x – y = 2. If x=3 and y=2, then the answer is NO but if x=4 and y=2, then the answer is YES. Not sufficient.
(2) xy = 8. If x=8 and y=1, then the answer is NO but if x=4 and y=2, then the answer is YES. Not sufficient.
(1)+(2) Solving x – y = 2 and xy = 8 gives two sets of solutions: (x, y) = (4, 2) and (x, y) = (-2, -4). For both x^y = y^x. Sufficient.
Answer: C.
