Is the integer n a multiple of 15? 1) n is a muliple of 20 : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 23 Jan 2017, 17:29

### 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

# Is the integer n a multiple of 15? 1) n is a muliple of 20

Author Message
Manager
Joined: 17 Aug 2006
Posts: 87
Followers: 1

Kudos [?]: 17 [0], given: 0

Is the integer n a multiple of 15? 1) n is a muliple of 20 [#permalink]

### Show Tags

13 Nov 2008, 04:30
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is the integer n a multiple of 15?

1) n is a muliple of 20

2) n +6 is a multiple of 3
SVP
Joined: 17 Jun 2008
Posts: 1569
Followers: 11

Kudos [?]: 250 [0], given: 0

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

13 Nov 2008, 04:57
C.

From stmt1: n has 5 as one of the factors.
From stmt2: n has 3 as one of the factors.

Combining both, n is divisible by 15.
Senior Manager
Joined: 21 Apr 2008
Posts: 269
Location: Motortown
Followers: 2

Kudos [?]: 143 [0], given: 0

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

13 Nov 2008, 06:12
scthakur wrote:
C.

From stmt1: n has 5 as one of the factors.
From stmt2: n has 3 as one of the factors.

Combining both, n is divisible by 15.

agreed
Manager
Joined: 23 Jul 2008
Posts: 203
Followers: 1

Kudos [?]: 119 [0], given: 0

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

13 Nov 2008, 11:30
1) n= 20,40,60,80,100,120 and so on may be may be not
2)n=0,3,6,9,12,15 and so on again may be may be not
combining possible values of n= 60,120,180 divisibility by 15 yes
IMO C
Retired Moderator
Joined: 18 Jul 2008
Posts: 994
Followers: 10

Kudos [?]: 196 [0], given: 5

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

30 Nov 2008, 20:33
That's the answer I got, but I ended plugging in numbers. Can you explain your method? I need help on factoring.

scthakur wrote:
C.

From stmt1: n has 5 as one of the factors.
From stmt2: n has 3 as one of the factors.

Combining both, n is divisible by 15.
Director
Joined: 14 Aug 2007
Posts: 733
Followers: 10

Kudos [?]: 183 [1] , given: 0

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

30 Nov 2008, 22:20
1
KUDOS
That's the answer I got, but I ended plugging in numbers. Can you explain your method? I need help on factoring.

scthakur wrote:
C.

From stmt1: n has 5 as one of the factors.
From stmt2: n has 3 as one of the factors.

Combining both, n is divisible by 15.

we have to find if n is divisible by 15 or not.

for a number to be divisible by 15 it needs 3*5 as factors.

1) tells us that 5*4 are factors (but no 3)
2) tells us that 3 is a factor. (but no 5)

together we know that 5*3 both are factors
Current Student
Joined: 28 Dec 2004
Posts: 3384
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 15

Kudos [?]: 283 [0], given: 2

Re: PROB PREP 8 OF 37 [#permalink]

### Show Tags

01 Dec 2008, 14:10
i get C too...here is how.

stmnt 2 says n-6=3M so n=3m-6 or n=3(M-2) where M is some integer

n/3= m-2 or some integer..so N must be a mutiple of 3 ..stmnt says n is also multiple of 5
Re: PROB PREP 8 OF 37   [#permalink] 01 Dec 2008, 14:10
Display posts from previous: Sort by