BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

If m is an integer

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

If m is an integer

by sanju09 » Tue May 18, 2010 5:15 am
If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 214
Joined: Mon Mar 29, 2010 1:46 pm
Location: Houston, TX
Thanked: 37 times
GMAT Score:700

by sk818020 » Tue May 18, 2010 6:53 am
(1) Simply tells us that 2 does not devide into m and even number of times. Which also does not tell us that m divides into 2 at all, thus, (1) insufficient.

(2) m-3 is an even integer. The only way m-3 could be an even integer is if m is odd because and odd plus or minus an odd will be equal to an even integer. For example, 9-3=6. Thus, m is an odd integer. (2) Sufficient.

IMO B is the answer.
Top
Newbie | Next Rank: 10 Posts
Posts: 7
Joined: Sat Apr 30, 2011 5:48 am

by ashoo1711 » Tue May 10, 2011 9:31 am
Deleted the comment as I understand the solution now
Top
Legendary Member
Posts: 759
Joined: Mon Apr 26, 2010 10:15 am
Thanked: 85 times
Followed by:3 members

by clock60 » Tue May 10, 2011 10:03 am
may be i am wrong but i think that answer is D
we are told that m is an integer, and m is not divisible by 2, but if m is an integer and not divisible by 2 it is odd
by definition even integer is an integer that it is divisible by 2
so i think that 1 st is also suff
Top
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pm
Location: Toronto
Thanked: 1710 times
Followed by:614 members
GMAT Score:800

by Stuart@KaplanGMAT » Tue May 10, 2011 10:19 am
clock60 wrote:may be i am wrong but i think that answer is D
we are told that m is an integer, and m is not divisible by 2, but if m is an integer and not divisible by 2 it is odd
by definition even integer is an integer that it is divisible by 2
so i think that 1 st is also suff
Hi,

we're not told that m is not divisible by 2; we're told that m/2 is not an EVEN integer.

So, for example, if m=6, then m/2 = 6/2 = 3, which is not an even integer. Is 6 odd? NO.

However, if m=5, then m/2 = 5/2 = 2.5, which is not an even integer. Is 5 odd? YES.

Since both even and odd numbers can satisfy (1), it's insufficient to answer the question.
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Legendary Member
Posts: 759
Joined: Mon Apr 26, 2010 10:15 am
Thanked: 85 times
Followed by:3 members

by clock60 » Tue May 10, 2011 10:29 am
hi Stuart
great thanks for pointing out my mistake, bad on me,
in a fact i misread the problem
Top
Senior | Next Rank: 100 Posts
Posts: 87
Joined: Sun Jul 24, 2011 10:36 am

by [email protected] » Thu Jul 28, 2011 1:54 pm
sanju09 wrote:If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.

ANSWER SHOULD BE D
FROM 1: M/2 IS NOT AN EVEN INTEGER. SO IT MAY BE A ODD INTEGER OR IT MAY BE A FRACTION (M MAY BE FRACTION). BUT FROM THE STATEMENT WE KNOW M IS AN INTEGER. THUS M IS ODD.
FROM SECOND:IT IS CLEARLY STATED THAT M IS ODD.

SO ANSWER IS D
Top
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Sat Jul 30, 2011 2:35 am
[email protected] wrote:
sanju09 wrote:If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.

ANSWER SHOULD BE D
FROM 1: M/2 IS NOT AN EVEN INTEGER. SO IT MAY BE A ODD INTEGER OR IT MAY BE A FRACTION (M MAY BE FRACTION). BUT FROM THE STATEMENT WE KNOW M IS AN INTEGER. THUS M IS ODD.
FROM SECOND:IT IS CLEARLY STATED THAT M IS ODD.

SO ANSWER IS D
Please re read Stuart Kovinsky's post on top that best explains why (1) is insufficient.
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Post new topic Post Reply
• Page 1 of 1