BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Please validate

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 489
Joined: Tue Jul 05, 2011 11:10 am
Thanked: 28 times
Followed by:5 members

Please validate

by gmatblood » Fri Nov 04, 2011 9:14 am
Is n divisible by 12?
1. n/6 is an integer.
2. n/4 is an integer.

[spoiler]from 1) N can be 6,12,18,24,30,36,42 ... (Insufficient)

from 2) N can be 4,8,12,16,20,24 ... (Insufficient)

From 1 and 2, N can be 12,24, ... (Sufficient)[/spoiler]
Top
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 1101
Joined: Fri Jan 28, 2011 7:26 am
Thanked: 47 times
Followed by:13 members
GMAT Score:640

by HSPA » Fri Nov 04, 2011 9:54 am
yup you solved it correct : LCM problem
First take: 640 (50M, 27V) - RC needs 300% improvement
Second take: coming soon..
Regards,
HSPA.
Top
User avatar
Legendary Member
Posts: 1255
Joined: Fri Nov 07, 2008 2:08 pm
Location: St. Louis
Thanked: 312 times
Followed by:90 members

by Tani » Fri Nov 04, 2011 10:05 am
To be divisible by 12, n must be divisible by 2 twice plus 3.

1) To be divisible by 6, n must be divisible by 2 and 3. - doesn't tell us that we can divide by 2 twice
2) to be divisible by 4, n must be divisible by 2 twice - doesn't tell us that n is divisible by three

combining, n must be divisible by two twice plus a 3, therefore it must be divisible by twelve
Tani Wolff
Top
Post new topic Post Reply
• Page 1 of 1