|
|
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.
08 Dec 2017, 01:38
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:
55% (01:38) correct
45%
(01:29)
wrong
based on 110
sessions
History
Date
Time
Result
Not Attempted Yet
If c > d > b, is d an integer?
(1) c = b + 1
(2) \(d=\frac{c+b}{2}\)
New tricky question
(1) c = b + 1
(2) \(d=\frac{c+b}{2}\)
New tricky question
08 Dec 2017, 02:04
Kudos
Bookmarks
(1) c=1,5 b=0,5 then d lie in 0,5<d<1,5 and can be 1 or 0,7 so it is unclear whether it is integer or not.
Insufficient
(2) d=(c+b)/2
c= 1,5 b=0,5 d= (1,5+0,5)/2=1 - integer
c=1,8 b=0,8 d= (1,8+0,8)/2=1,3 - NOT an integer
(1) + (2)
c= 1,5 b=0,5 d= (1,5+0,5)/2=1 - integer
c=1,8 b=0,8 d= (1,8+0,8)/2=1,3 - NOT an integer
Answer should be E I guess
Insufficient
(2) d=(c+b)/2
c= 1,5 b=0,5 d= (1,5+0,5)/2=1 - integer
c=1,8 b=0,8 d= (1,8+0,8)/2=1,3 - NOT an integer
(1) + (2)
c= 1,5 b=0,5 d= (1,5+0,5)/2=1 - integer
c=1,8 b=0,8 d= (1,8+0,8)/2=1,3 - NOT an integer
Answer should be E I guess
08 Dec 2017, 10:47
Kudos
Bookmarks
chetan2u
(1) If b is an integer, then c=b+1 is also an integer, else not. But in any case d might or might not be an integer. So Insufficient.
(2) d = (c+b)/2 This tells us that d is the arithmetic mean of c & b, and thus c, d, b are in Arithmetic Progression (AP). But we cant say whether any or all of them are integers or not. Eg, c, d, b could be 3, 2, 1 respectively or they could be 3.3, 3.2, 3.1 respectively. So Insufficient.
Combining the two statements, c, d, b are in AP and c=b+1. But we could have a case where d is an integer (eg, c/d/b could be 3/2.5/2 respectively) OR we could also have a case where d is NOT an integer (eg, c/d/b could be 3.5/3/2.5 respectively). So d might or might not be an integer still. Insufficient.
Hence E answer
