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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2001:30 PM EST
-02:30 PM IST
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.
Nov 2206:30 AM PST
-08:30 AM PST
Let’s dive deep into advanced CR to ace GMAT Focus! Join this webinar to unlock the secrets to conquering Boldface and Paradox questions with expert insights and strategies. Elevate your skills and boost your GMAT Verbal Score now!
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2407:00 PM PST
-08:00 PM PST
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
Nov 2510:00 AM EST
-11:00 AM EST
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.
alphonsa
Joined: 22 Jul 2014
Last visit: 25 Oct 2020
Posts: 106
Given Kudos: 197
Concentration: General Management, Finance
Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
WE:Engineering (Energy)
Products:
Schools: Cox '19 (D) Babson '19 (A$) Katz '19 (D) Eller"19 (A$) Northeastern '19 (A$) Krannert '19 (A$) ISB '18 (D) Rutgers '19 (A) Olin '19 (I)
GMAT 1: 670 Q48 V34
Posts: 106
21 Aug 2014, 00:15
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
57% (01:55) correct
43%
(01:53)
wrong
based on 158
sessions
History
Date
Time
Result
Not Attempted Yet
Is (x - y) divisible by 3?
(1) (x^2 – y^2) is divisible by 3.
(2) (x^3 + y^3) is divisible by 3.
Source:4gmat
(1) (x^2 – y^2) is divisible by 3.
(2) (x^3 + y^3) is divisible by 3.
Source:4gmat
WiziusCareers1
Joined: 27 Apr 2009
Last visit: 19 Nov 2025
Posts: 114
Own Kudos:
Given Kudos: 35
Status:Not Applying
Location: India
Schools: HBS '14 (A)
GMAT 1: 730 Q51 V36
21 Aug 2014, 03:12
Kudos
Bookmarks
The question is asking if (x - y)/3 = int?
Considering statement (1) alone:
(x^2 - y^2)/3 = int
We can have x =2 and y = 1 but this gives (x - y)/3 is not an integer.
We can have x = 6 and y = 3, this gives (x - y)/3 is an integer.
Different answers. So, INSUFFICIENT.
AD goes out.
Considering statement (2) alone:
(x^3 + y^3)/3 = int
=> We can have x = 2 and y = 1, but it gives (x - y)/3 is not an integer.
We can also have x = 6, y = 3 and this gives (x - y)/3 as an integer.
DIFFERENT ANSWERS.
INSUFFICIENT
B goes out.
Combining together:
We can still have x = 2 and y = 1, it gives (x - y)/3 is not an integer.
And we can also have x = 6 and y = 3, it gives (x - y)/3 is an integer.
INSUFFICIENT.
The answer is (E)
Considering statement (1) alone:
(x^2 - y^2)/3 = int
We can have x =2 and y = 1 but this gives (x - y)/3 is not an integer.
We can have x = 6 and y = 3, this gives (x - y)/3 is an integer.
Different answers. So, INSUFFICIENT.
AD goes out.
Considering statement (2) alone:
(x^3 + y^3)/3 = int
=> We can have x = 2 and y = 1, but it gives (x - y)/3 is not an integer.
We can also have x = 6, y = 3 and this gives (x - y)/3 as an integer.
DIFFERENT ANSWERS.
INSUFFICIENT
B goes out.
Combining together:
We can still have x = 2 and y = 1, it gives (x - y)/3 is not an integer.
And we can also have x = 6 and y = 3, it gives (x - y)/3 is an integer.
INSUFFICIENT.
The answer is (E)
21 Aug 2014, 03:14
Kudos
Bookmarks
alphonsa
Not a GMAT-like question. Every GMAT divisibility question will tell you in advance that any unknowns represent positive integers (ALL GMAT divisibility questions are limited to positive integers only).
Is (x - y) divisible by 3?
(1) (x^2 – y^2) is divisible by 3 --> (x - y)(x + y) is divisible by 3. If x = y = 0, then the answer is YES but if x = 2 and y = 1, then the answer is NO. Not sufficient.
(2) (x^3 + y^3) is divisible by 3 --> (x + y)(x^2 - xy + y^2) is divisible by 3. If x = y = 0, then the answer is YES but if x = 2 and y = 1, then the answer is NO. Not sufficient.
(1)+(2) We can use the same examples: if x = y = 0, then the answer is YES but if x = 2 and y = 1, then the answer is NO. Not sufficient.
Answer: E.
