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

Redeem

can't see through

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

can't see through

by sanju09 » Fri May 21, 2010 4:28 am
Please read it for me...
Attachments
number_properties_1_113.jpg
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Data Sufficiency |
Legendary Member
Posts: 576
Joined: Sat Mar 13, 2010 8:31 pm
Thanked: 97 times
Followed by:1 members

by liferocks » Fri May 21, 2010 4:32 am
Is m+z>0

1. m-3z>0
2. 4z-m>0

discussed here https://www.beatthegmat.com/greater-than ... tml#254470
"If you don't know where you are going, any road will get you there."
Lewis Carroll
Top
User avatar
GMAT Instructor
Posts: 1052
Joined: Fri May 21, 2010 1:30 am
Thanked: 335 times
Followed by:98 members

by Patrick_GMATFix » Fri May 21, 2010 10:18 am
To be fair, this is a tough question, but it should teach you an important take-away: In general it's better to rephrase your equations so that you do not have leading negative signs in front of your variables. In this case, rewrite the statements as:
(1) m > 3z
(2) 4z > m.

Alone these give no information about signs. However when we put them together, we learn that 4z > 3z --> z > 0 and that will make all the difference (since m > 3z, m will also be > 0). The correct answer is C

This is QID 1020

-Patrick
Top
Post new topic Post Reply
• Page 1 of 1