Author 
Message 
TAGS:

Hide Tags

Manager
Joined: 21 May 2011
Posts: 229

If z is an integer, is z even? [#permalink]
Show Tags
Updated on: 15 Feb 2014, 03:19
4
This post was BOOKMARKED
Question Stats:
55% (00:42) correct 45% (00:47) wrong based on 174 sessions
HideShow timer Statistics
If z is an integer, is z even? (1) z/2 is not an odd integer. (2) z + 5 is an odd integer.
Official Answer and Stats are available only to registered users. Register/ Login.
Originally posted by bschool83 on 24 Jul 2011, 15:49.
Last edited by Bunuel on 15 Feb 2014, 03:19, edited 3 times in total.
Renamed the topic and edited the question.



Intern
Joined: 17 May 2009
Posts: 30
Location: United States
GPA: 3.62
WE: Corporate Finance (Manufacturing)

Re: DS  700 level  even integer [#permalink]
Show Tags
24 Jul 2011, 20:09
bschool83 wrote: If z is an integer, is z even?
(1) is not an odd integer.
(2) z + 5 is an odd integer. I assume statement 1 says that "\(z\) is not an odd integer." Statement 1) If \(z\) is NOT an odd integer, but \(z\) is an integer, \(z\) must be an even integer. All integers are either odd or even, including \(0\). Sufficient. Statement 2) \(z + odd = odd\), so \(z\) must be even. If \(z\) were odd, then \(z + odd\) would equal an even number. \(O + O = E\) and \(E + O = O\). Sufficient.



Intern
Joined: 15 Mar 2010
Posts: 9

Re: DS  700 level  even integer [#permalink]
Show Tags
24 Jul 2011, 20:16
Ans D. Since from stmt 1, if Z is an integer and not odd then the possible values are 0 or any even integer . Suff
From Stmt 2: Even Int + 5 = odd Integer. Hence Suff



Senior Manager
Joined: 08 Nov 2010
Posts: 361
WE 1: Business Development

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 02:02
bschool83. If you dont mind, please make sure to mark level of the question in a right way. This is not a 700 level question. Thank you.
_________________
GMAT Club Premium Membership  big benefits and savings



Manager
Joined: 03 Jun 2010
Posts: 135
Location: Dubai, UAE
Schools: IE Business School, Manchester Business School, HEC Paris, Rotterdam School of Management, Babson College

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 05:06
Is this really a 700 level question ? The answer is clearly D If it's not odd then it's even, hence statement 1 sufficient Statement 2 is also sufficient because as we try combinations only an even number with an odd number yields an odd number and there is no restriction on positive or negative even. Thanks Posted from GMAT ToolKit



Manager
Joined: 11 Jul 2009
Posts: 142
WE: Design (Computer Software)

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 08:20
Both are suffcient .D is answer
_________________
Kaustubh



Manager
Joined: 21 May 2011
Posts: 229

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 13:22
fluke wrote: bschool83 wrote: If z is an integer, is z even?
(1) is not an odd integer.
(2) z + 5 is an odd integer. Please complete statement 1. (1) z/2 is not an odd integer



Intern
Joined: 13 Jul 2011
Posts: 10
Location: India
Concentration: Finance, International Business
GPA: 2.45
WE: Research (Other)

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 18:16
1
This post was BOOKMARKED
Agree with Fluke..
Z/2 is not an odd integer..we cannot assume that it is an integer in the first place!
Ans B...
If thats the catch, then it should be a 700 level question..



Intern
Status: If I play my cards right, I can work this to my advantage
Joined: 18 Jul 2011
Posts: 14
Location: India
Concentration: Operations, Social Entrepreneurship
GMAT Date: 11122011
WE: Information Technology (Telecommunications)

Re: DS  700 level  even integer [#permalink]
Show Tags
26 Jul 2011, 23:45
official ans plz ?
from what i solved ... assuming z/2 is an integer ... answer should be "d" but ... if z/2 belongs to real numbers (including decimals) then it should be "b" as suggested by fluke



Senior Manager
Joined: 27 May 2012
Posts: 464

Re: If z is an integer, is z even? (1) z/2 is not an odd [#permalink]
Show Tags
15 Feb 2014, 01:01
2
This post received KUDOS
bschool83 wrote: If z is an integer, is z even?
(1) z/2 is not an odd integer.
(2) z + 5 is an odd integer. 1) z/2 =1.5 then Z= 3,Z is odd, ans is No, if Z/2 =2 then z= 4, z is even , ans is yes insufficient. 2)z + 5 is an odd integer > then z must be even sufficient Answer B
_________________
 Stne



Intern
Joined: 05 Feb 2016
Posts: 13

Re: If z is an integer, is z even? [#permalink]
Show Tags
21 Jun 2016, 00:12
I think answer is E. because in second case for z=0 , z+5 is odd is also valid. But for z=0 , z is not an even integer. Please correct me



Intern
Joined: 09 Jun 2016
Posts: 2

Re: If z is an integer, is z even? [#permalink]
Show Tags
21 Jun 2016, 00:23
This question is really good question.



Senior Manager
Joined: 02 Mar 2012
Posts: 344

Re: If z is an integer, is z even? [#permalink]
Show Tags
21 Jun 2016, 06:52
1
This post received KUDOS
B
if z=27 1)z/2=13.5 so it neither odd(nor even nor an INTEGER)not suff 2)suff(given z is an integer



BSchool Forum Moderator
Joined: 12 Aug 2015
Posts: 2576
GRE 1: 323 Q169 V154

Re: If z is an integer, is z even? [#permalink]
Show Tags
01 Jan 2017, 12:03
Here is my solution to this one >
We need the even odd nature of integer z
Statement 1> z=5 z=4
Taking these two test cases we can say that this is an insufficient statement
Statement 2> zodd=odd => z=> odd+odd=even Hence sufficient
Hence B
_________________
Getting into HOLLYWOOD with an MBA The MOST AFFORDABLE MBA programs!STONECOLD's BRUTAL Mock Tests for GMATQuant(700+)Average GRE Scores At The Top Business Schools!



NonHuman User
Joined: 09 Sep 2013
Posts: 6644

Re: If z is an integer, is z even? [#permalink]
Show Tags
19 Mar 2018, 22:06
Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up  doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources




Re: If z is an integer, is z even?
[#permalink]
19 Mar 2018, 22:06






