Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 04 May 2015, 08:54

### 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

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# GMAT Prep : odd and even

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Manager
Joined: 28 Aug 2006
Posts: 245
Location: Albuquerque, NM
Followers: 1

Kudos [?]: 1 [0], given: 0

GMAT Prep : odd and even [#permalink]  31 Dec 2006, 20:18
Could some one please explain this to me
Attachments

5.JPG [ 68.38 KiB | Viewed 437 times ]

Senior Manager
Joined: 23 Jun 2006
Posts: 387
Followers: 1

Kudos [?]: 311 [0], given: 0

[#permalink]  31 Dec 2006, 20:53
nice question.... answer is A.
from stem we can infer that at least one from x,y,z is odd and at least one is even.

lets check st1. it is given that x(y+z) is even. can x be odd?
if it is, then (y+z) must be even, so they must have the same "oddity", and since there must be at least one even number, we can infer that y and z must be even if x is odd. however - this violates stem since in this arrangement xy+z is even.

so x cannot be odd - so it must be even. hence sufficient.

lets check st2

take x=1 y=2 z=3 and compare to y=1 x=2 z=3

both satisfy stem and st2, but in one x is odd and in the second x is even.

hence insufficient.

answer is A.
Manager
Joined: 28 Aug 2006
Posts: 245
Location: Albuquerque, NM
Followers: 1

Kudos [?]: 1 [0], given: 0

[#permalink]  01 Jan 2007, 05:35
Good one, this was the question no 36 on the test and my mind was already fried (taking two tests in row)

Thanks, hobbit
Director
Joined: 28 Dec 2005
Posts: 922
Followers: 2

Kudos [?]: 37 [0], given: 0

[#permalink]  01 Jan 2007, 06:08
This was a good question. I took too much time to analyze this though. I can imagine I would have got it wrong on the test, esp if it came at the end of the test.
[#permalink] 01 Jan 2007, 06:08
Similar topics Replies Last post
Similar
Topics:
GMAT Prep Odd/Even Problem 2 21 Dec 2009, 11:19
1 Odd/Even 11 03 Oct 2008, 09:54
odds and evens 6 28 Aug 2008, 19:28
GMAT Prep even odd 4 01 Jan 2007, 20:20
Odds and Evens.. 10 03 Apr 2006, 21:07
Display posts from previous: Sort by

# GMAT Prep : odd and even

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.