Gmat prep1 ds4

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 121
Joined: Thu Jun 11, 2009 1:16 am
Thanked: 4 times
GMAT Score:720

Gmat prep1 ds4

by Naruto » Wed Jul 22, 2009 3:56 am
Please explain , I cant understand what I am missing here.
Attachments
DS4D.JPG

Master | Next Rank: 500 Posts
Posts: 179
Joined: Mon Dec 29, 2008 4:41 am
Thanked: 2 times

by abhinav85 » Wed Jul 22, 2009 7:30 am
IMO C.

Basically the question is asking for what is the value of X?

From 1st We get two equation X = q x 2 + 1
(q = quotient) the other equation is X = q x 3 + 0.

so it could be 9 or 21.
Insuffcient.

From 2nd statment we get X = q x 12 + 3.
it could be any number 15,27,39 etc.
Insufficient.

By taking both the statment together, the numbers could be 15,27,39 which statifies all the three equation and gives the remainder 3 when divided by 6.

Master | Next Rank: 500 Posts
Posts: 189
Joined: Thu Apr 03, 2008 2:03 pm
Location: USA
Thanked: 21 times

by rohan_vus » Wed Jul 22, 2009 7:53 am
Well i disagree. . question is not asking whats the value of x but what the remainder when its divided by 6

1) from stmnt 1 , its sure that the x is odd multiple of 3 . Any odd multiple of 3 when didvide by 6 will always give 3 as remainder --> Suff.

2) From stmnt 2 the x is of form 12m + 3 ---> 3 will be the remainder when didvide by 6 ..hence Suff.

So D shuold be the answer

Master | Next Rank: 500 Posts
Posts: 186
Joined: Sat Sep 02, 2006 7:50 pm
Thanked: 10 times
Followed by:1 members

by ogbeni » Wed Jul 22, 2009 7:58 am
^I'm with you rohan. D should be the answer

Master | Next Rank: 500 Posts
Posts: 121
Joined: Thu Jun 11, 2009 1:16 am
Thanked: 4 times
GMAT Score:720

by Naruto » Wed Jul 22, 2009 8:34 am
rohan_vus wrote:Well i disagree. . question is not asking whats the value of x but what the remainder when its divided by 6

1) from stmnt 1 , its sure that the x is odd multiple of 3 . Any odd multiple of 3 when didvide by 6 will always give 3 as remainder --> Suff.

2) From stmnt 2 the x is of form 12m + 3 ---> 3 will be the remainder when didvide by 6 ..hence Suff.

So D shuold be the answer
Thanks OA is D