Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 04 Jul 2015, 06:18

### 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 (x^4+y^4)>z^4? 1) x^2 + y^2 > z^2 2) x+y>z

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Intern
Joined: 11 Sep 2006
Posts: 44
Followers: 0

Kudos [?]: 3 [0], given: 0

Is (x^4+y^4)>z^4? 1) x^2 + y^2 > z^2 2) x+y>z [#permalink]  03 Nov 2006, 23:19
Is (x^4+y^4)>z^4?

1) x^2 + y^2 > z^2
2) x+y>z
Intern
Joined: 17 Sep 2006
Posts: 46
Followers: 0

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

[#permalink]  03 Nov 2006, 23:57
Tricky question,

but I would go for E.

S2 clearly insufficient as z coult be negative.

S1 is difficult, but it's insufficient too. For example, what if it's 0.5+0.5>0.9. If we square each of them (to get ^4), we get 0.25+0.25>0.81, which is false. But if we would have 25+9>4, the statement would be true.

We don't do anything with S1+S2, E it is.
[#permalink] 03 Nov 2006, 23:57
Similar topics Replies Last post
Similar
Topics:
3 x^4 + y^4 > z^4? (1) x^2 + y^2 > z^2 (2) x+y > z 3 23 Sep 2008, 09:05
Is x^4 + y^4 ?z^4? 1) x^2+y^2 2) x+y >z 12 15 Jul 2008, 08:40
1 Is x^4 + y^4 > z^4? (1) x^2 + y^2 > z^2 (2) x + y > 14 01 Jun 2008, 04:42
Is x^4 + y^4 > z^4? 1) x^2 + y^2 > z^2 2) x + y > z 4 26 Jul 2007, 02:21
Is x^4 + y^4 > z^4 (1) x^2 + y^2 > z^2 (2) x + y > 3 23 Nov 2006, 14:18
Display posts from previous: Sort by

# Is (x^4+y^4)>z^4? 1) x^2 + y^2 > z^2 2) x+y>z

 Question banks Downloads My Bookmarks Reviews Important topics

 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®.