If 9 is a factor of 2x, which of the following may not be an : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 17 Jan 2017, 07:16

### 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

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

# If 9 is a factor of 2x, which of the following may not be an

Author Message
Manager
Joined: 15 Nov 2006
Posts: 219
Location: Ohio
Followers: 1

Kudos [?]: 53 [0], given: 0

If 9 is a factor of 2x, which of the following may not be an [#permalink]

### Show Tags

06 Mar 2007, 20:24
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If 9 is a factor of 2x, which of the following may not be an integer?
a)6x/54 +2x/3
B)(4x-18)/9
C) (2x+27)/9
D)(81-4xsqr)/81
E)(2x-3)/3
SVP
Joined: 01 May 2006
Posts: 1797
Followers: 9

Kudos [?]: 149 [0], given: 0

### Show Tags

06 Mar 2007, 23:54
(A) for me

We have : 2*x = 9*k where k is an integer

A) 6x/54 +2x/3
= 3*(2*x)/54 + 2*x/3
= 3*(9*k)/54 + 9*k/3
= 3*k/6 + 3*k
= k/2 + 3k : may or may not be an integer

For a verification

B) (4x-18)/9
= (18*k - 18)/9
= 2k - 2 >>>>> OK

C) (2x+27)/9
= (9*k + 27) / 9
= k + 3 >>>> OK

D) (81-4xsqr)/81
= I dont know the meaning u want to put

E) (2x-3)/3
= (9*k - 3)/3
= 3*k - 1 >>> OK
Manager
Joined: 09 Jan 2007
Posts: 240
Followers: 2

Kudos [?]: 27 [0], given: 0

### Show Tags

07 Mar 2007, 09:11

In (D),

(81-4xsqr)/81 can be written as

=> 81/81 - 4*x^2/81

=> 1 - (2x * 2x)/81

as 9 is a factor of 2x, 2nd part is also an integer.
07 Mar 2007, 09:11
Display posts from previous: Sort by

# If 9 is a factor of 2x, which of the following may not be an

 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®.