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

It is currently 27 Aug 2014, 17:43

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

a, b, c are integers. Is (a*b*c)! even? (1) a^2-5a=-6 (2)

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1613
Followers: 5

Kudos [?]: 44 [0], given: 0

a, b, c are integers. Is (a*b*c)! even? (1) a^2-5a=-6 (2) [#permalink] New post 13 Aug 2003, 09:23
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
a, b, c are integers. Is (a*b*c)! even?

(1) a^2-5a=-6
(2) bc>0
Manager
Manager
avatar
Joined: 14 Aug 2003
Posts: 88
Location: barcelona
Followers: 1

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

 [#permalink] New post 14 Aug 2003, 01:38
(a*b*c)! can only be odd if a*b*c=1...
A) tells us that a=2 or a=3... b, c integers... a*b*c<>1... so A suf...
B) bc>0... not suf...
id say answer is A
SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1613
Followers: 5

Kudos [?]: 44 [0], given: 0

 [#permalink] New post 14 Aug 2003, 01:55
javropu wrote:
(a*b*c)! can only be odd if a*b*c=1...
A) tells us that a=2 or a=3... b, c integers... a*b*c<>1... so A suf...
B) bc>0... not suf...
id say answer is A



(a*b*c)! can also be odd if a*b*c=0 since 0!=1
Manager
Manager
User avatar
Joined: 11 Jun 2003
Posts: 72
Location: Moscow, Russia
Followers: 1

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

 [#permalink] New post 14 Aug 2003, 02:03
stolyar wrote:
Ok, it is getting hot...
Why E?


Upsss :shock:
sorry did not notice "!"
Manager
Manager
avatar
Joined: 14 Aug 2003
Posts: 88
Location: barcelona
Followers: 1

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

 [#permalink] New post 14 Aug 2003, 02:04
0!=1??? i didnt know that... thx pal... in that case, id go for C...
(1) tells us a=2 or a=3... not suf
(2) bc>0 not suf
but (1) & (2) suf, coz we know a=2 or a=3, b, c<>0=> a*b*c<>0 and a*b*c<>1... suf
SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1613
Followers: 5

Kudos [?]: 44 [0], given: 0

 [#permalink] New post 14 Aug 2003, 03:34
Dmitry wrote:
stolyar wrote:
Ok, it is getting hot...
Why E?


Than C!!!


C is correct, but give a clear rationale.
the foregoing is pretty vague.
Manager
Manager
User avatar
Joined: 24 Jun 2003
Posts: 147
Location: India
Followers: 1

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

GMAT Tests User
 [#permalink] New post 15 Aug 2003, 00:52
stolyar wrote:
Dmitry wrote:
stolyar wrote:
Ok, it is getting hot...
Why E?


Than C!!!


C is correct, but give a clear rationale.
the foregoing is pretty vague.


n! is always even except when n=1 or 0

Now from (1), we know that a is a non zero number and that its not 1

From (2) we know that b and c are non zero

Therefore, from (1) and (2) together we can conclude that (a*b*c)! is even

Hence C
  [#permalink] 15 Aug 2003, 00:52
    Similar topics Author Replies Last post
Similar
Topics:
Is 2a/bc an integer? Where a,b,c are positive integers. (1) dimitri92 1 03 Jul 2010, 23:25
2 Experts publish their posts in the topic Is 2(a+b-c) an odd integer? 1. a, b and c are consecutive ykaiim 10 07 May 2010, 09:32
Is ABC divisible by 24? 1. A B C are consecutive integers 2. bmwhype2 4 29 Oct 2007, 11:31
a,b,c three consecutive even integer! is abc divisable by 3 chiragr 2 12 Jun 2006, 20:23
For integers a, b, and c, a/b-c=1 , What is the value of mandy 3 02 Jul 2005, 14:41
Display posts from previous: Sort by

a, b, c are integers. Is (a*b*c)! even? (1) a^2-5a=-6 (2)

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.