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.
Mar 2709:30 AM PDT
-10:30 AM PDT
Preparing for the GMAT? Avoid these 5 major mistakes that can lower your score and hurt your MBA dreams. In this expert panel discussion, 4 top GMAT coaches - GMAT Ninja, Jeff Miller from TTP, Rida Shafiq from eGMAT, and Chris Gentry from Manhattan Prep- Mar 27
10:00 AM PDT
-11:00 AM PDT
What happens after getting an MBA? Is it worth the investment? To find out, I interviewed 10 GMAT Club professionals who have completed their MBAs and built careers in consulting, finance, tech, and entrepreneurship. Their answers might surprise you! 
Mar 2911:30 AM EDT
-12:30 PM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
Mar 3005:30 AM PDT
-07:30 AM PDT
We know Strengthen and Weaken questions account for more than 50% of the CR questions on the GMAT. With CR becoming even more important on GMAT Focus, it's time you strengthen your weaknesses with an approach that improves your solving time and accuracy!
Mar 3011:00 AM IST
-01:00 PM IST
Attend this session to evaluate your current skill level, learn process skills, and solve through tough Arithmetic questions.
Mar 3110:00 AM EDT
-11:59 PM EDT
The Target Test Prep team has recently introduced TTP OnDemand GMAT, a 400-hour live masterclass video course created by Scott Woodbury-Stewart, founder and CEO of Target Test Prep.
Apr 0308:00 PM PDT
-09:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
13 Dec 2018, 13:26
Kudos
Bookmarks
C
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% (01:36) correct
18%
(01:37)
wrong
based on 503
sessions
History
Date
Time
Result
Not Attempted Yet
If d and e are positive integers, is d a multiple of 9?
(1) 5e - 7 is a multiple of 9.
(2) d - 2 = 5e
(1) 5e - 7 is a multiple of 9.
(2) d - 2 = 5e
13 Dec 2018, 15:00
Kudos
Bookmarks
(1) 5e - 7 is a multiple of 9. - Insufficient - as no info for d.
(2) d - 2 = 5e - Insufficient - as it may or may not be .... depending on values of d and e.
e.g., when e=1, d=7 -----> d is not a multiple of 9
but when e=5, d= 29 -----> d is a multiple of 9
Combining (1+2) ==> say , 5e - 7 = 9x ==> 5e=9x+7
hence , d-2 =9x+7 ==>d=9x+9 ==>d=9(x+1) ===> d definitely a multiple of 9 -Sufficient ...............Ans C
(2) d - 2 = 5e - Insufficient - as it may or may not be .... depending on values of d and e.
e.g., when e=1, d=7 -----> d is not a multiple of 9
but when e=5, d= 29 -----> d is a multiple of 9
Combining (1+2) ==> say , 5e - 7 = 9x ==> 5e=9x+7
hence , d-2 =9x+7 ==>d=9x+9 ==>d=9(x+1) ===> d definitely a multiple of 9 -Sufficient ...............Ans C
07 Mar 2020, 11:54
Kudos
Bookmarks
cdrectenwald
If d and e are positive integers, is d a multiple of 9?
(1) 5e - 7 is a multiple of 9.
(2) d - 2 = 5e
(1) 5e - 7 is a multiple of 9.
(2) d - 2 = 5e
Target question: Is d a multiple of 9?
Statement 1: 5e - 7 is a multiple of 9
This statement provides no information about d
Statement 1 is NOT SUFFICIENT
Statement 2: d - 2 = 5e
It's easier to analyze the statement if we rewrite the equation as: d = 5e + 2
There are several values of d and e that satisfy this equation. Here are two:
Case a: d = 7 and e = 1. Since 7 is not a multiple of 9, the answer to the target question is NO, d is not a multiple of 9
Case b: d = 27 and e = 5. Since 27 is a multiple of 9, the answer to the target question is YES, d is a multiple of 9
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined
Statement 1 tells us that 5e - 7 is a multiple of 9.
This means we can write: 5e - 7 = 9k (for some integer value of k)
Statement 2 tells us that d - 2 = 5e, which we can rewrite as: d = 5e + 2
KEY STEP: Take d = 5e + 2 and rewrite it as: d = 5e - 7 + 9
Aside: I did this because we have some very specific information about 5e - 7 (it equals 9k, for some integer value of k)
So, we have: d = 5e - 7 + 9
Which is the same as: d = (5e - 7) + 9
Now substitute to get: d = 9k + 9
Now factor out the 9 to get: d = 9(k + 1)
At this point, it's clear that d is a multiple of 9
The answer to the target question is YES, d is a multiple of 9
Since we can answer the target question with certainty, the combined statements are SUFFICIENT
Answer: C
Cheers,
Brent
