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 1612:00 PM EDT
-11:59 PM EDT
You’re first to know: Save $200 on GMAT prep starting tomorrow, 4/13. Get 6 official practice tests and study with real questions. Be ready to save!
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.
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
69% (02:23) correct
31%
(02:45)
wrong
based on 927
sessions
History
Date
Time
Result
Not Attempted Yet
If \(A\), \(B\), \(C\), and \(D\) are integers such that \(A - C + B\) is even and \(D + B - A\) is odd, which of the following expressions must be odd?
A. \(A + D\)
B. \(B + D\)
C. \(C + D\)
D. \(A + B\)
E. \(A + C\)
A. \(A + D\)
B. \(B + D\)
C. \(C + D\)
D. \(A + B\)
E. \(A + C\)
Experience GMAT Club Test Questions
Yes, you've landed on a GMAT Club Tests question
Craving more? Unlock our full suite of GMAT Club Tests here
Want to experience more? Get a taste of our tests with our free trial today
Rise to the challenge with GMAT Club Tests. Happy practicing!
19 Apr 2024, 04:03
Kudos
Bookmarks
Official Solution:
If \(A\), \(B\), \(C\), and \(D\) are integers such that \(A - C + B\) is even and \(D + B - A\) is odd, which of the following expressions must be odd?
A. \(A + D\)
B. \(B + D\)
C. \(C + D\)
D. \(A + B\)
E. \(A + C\)
Subtract the first equation from the second:
\((D + B - A) - (A - C + B) = odd - even\);
\(C + D - 2A = odd\);
\(C + D = odd - 2A\);
\(C + D = odd - even\);
\(C + D = odd\).
Answer: C
If \(A\), \(B\), \(C\), and \(D\) are integers such that \(A - C + B\) is even and \(D + B - A\) is odd, which of the following expressions must be odd?
A. \(A + D\)
B. \(B + D\)
C. \(C + D\)
D. \(A + B\)
E. \(A + C\)
Subtract the first equation from the second:
\((D + B - A) - (A - C + B) = odd - even\);
\(C + D - 2A = odd\);
\(C + D = odd - 2A\);
\(C + D = odd - even\);
\(C + D = odd\).
Answer: C
General Discussion
21 Sep 2011, 01:33
Kudos
Bookmarks
Hi Jamifahad,
Even matrix method takes more than two mins in this problem since you have to jot down the even and odd values.
Try subtracting the equations
(A - C + B) - (D + B - A) = 2A-(C+D)
Even - Odd = Odd
So 2A-(C+D) is odd
2A is always even , so the subtrahend should always be odd, so C+D is odd.
Hope I am clear.
Even matrix method takes more than two mins in this problem since you have to jot down the even and odd values.
Try subtracting the equations
(A - C + B) - (D + B - A) = 2A-(C+D)
Even - Odd = Odd
So 2A-(C+D) is odd
2A is always even , so the subtrahend should always be odd, so C+D is odd.
Hope I am clear.
