Hello,
adkikani. My in-line responses are below.
adkikani wrote:
VeritasKarishma chetan2u MentorTutoring nick1816Quote:
If m and n are consecutive positive integers, is m greater than n ?
(1) m-1 and n+1 are consecutive positive integers.
(2) m is an even integer.
I find the highlighted part and St 1 to be
conflicting (usually I take the approach if I could SOLVE q stem by using the statements)
If m and n are two consecutive no, are not m-1 and n-1 ALSO consecutive by default?
I do not understand the conflict. Statement (1) presents the information in a distorted way, making it such that the larger value has changed places. That is, it is clear that
m is greater than
n within the constraints of the question stem and this statement, but
n + 1 yields the greater value than
m - 1. This is the sort of confusion the GMAT™ likes to create, just enough to make test-takers doubt themselves.
adkikani wrote:
To avoid, confusion, can I safely use number picking as below:
Case 1: I take m-1 less than n+1
m-1 = 2
n+1 = 3
hence m=3, n=2 m>n
In next case, I purposely take m-1 greater than n+1
m-1= 4
n+1= 3
Hence m=6, n=2 Still m>n
This second case does
not conform to the given constraints. If
m and
n are
consecutive positive integers, then
m - 1 cannot be greater than
n + 1. Assume, for the sake of argument, that you had originally picked
n to be the greater of the two integers. For instance, let
n = 2 and
m = 1.
m - 1 = 1 - 1 = 0
n + 1 = 2 + 1 = 3
These values do
not conform to the information given in Statement (1), so you would know you had leaned in the wrong direction.
adkikani wrote:
Clearly St 1 is suff.
St 2 is clearly insuff. Ans: A
Can you share your two cents?
Yes, clearly Statement (1) is indeed SUFFICIENT, but be careful about testing, willy-nilly, whatever numbers you want, since that sort of method could lead to incorrect conclusions.
I hope that helps. Thank you for bringing my attention to the question.
- Andrew
_________________