|
|
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.
22 Nov 2018, 03:53
Kudos
Bookmarks
E
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:
77% (01:02) correct
23%
(00:48)
wrong
based on 86
sessions
History
Date
Time
Result
Not Attempted Yet
Is m > n?
(1) 3/7 < m < 5/7
(2) 2/7 < n < 4/7
(1) 3/7 < m < 5/7
(2) 2/7 < n < 4/7
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
22 Nov 2018, 11:34
Kudos
Bookmarks
Bunuel
The question is whether m > n or whether m-n > 0. Individually the statements are obviously not sufficient as each statement talks about just one entity out of m/n and not the other. So lets combine them.
We are given the range of m as 3/7 < m < 5/7. And we are also given the range of n as 2/7 < n < 4/7. If we mutliply this range of n by -1, we will get:
-2/7 > n > -4/7 (signs of inequality will flip because we are mutliplying by a negative number).
OR -4/7 < n < -2/7.
Now range of m and -n are both inequalities in the same direction, so we can add them.
Adding the range of 'm' and '-n' we get:
3/7+(-4/7) < m+(-n) < 5/7+(-4/7) OR
-1/7 < m-n < 1/7.
So the required entity m-n could be negative or 0 or positive. We thus cant say whether m-n> 0 or m-n=0 or m-n <0. Not sufficient.
Hence E answer.
23 Nov 2018, 03:45
Kudos
Bookmarks
Bunuel
from 1: we can say 21<m<35
From 2: 14<n<28
so combing 1 & 2 m can be equal to n at an y value 22 to 27 , so in sufficient.. IMO E
