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

It is currently 28 Aug 2014, 07:40

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

m25 q14

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
1 KUDOS received
Intern
Intern
avatar
Joined: 17 Mar 2010
Posts: 39
Followers: 2

Kudos [?]: 58 [1] , given: 26

GMAT ToolKit User
m25 q14 [#permalink] New post 13 May 2010, 11:29
1
This post received
KUDOS
2
This post was
BOOKMARKED
If ABCD is a quadrilateral, is AB = BC = CD = DA?

1. AC is perpendicular to BD
2. AB + CD = BC + AD

Answer is E. But as far as I learned in school, the ONLY 2 quadrilaterals that have perpendicular diagonals are the rhombus and the square and both have all sides equal. I do not find the explanation correct.

_________________

If my post helped you : KUDOS KUDOS KUDOS

1 KUDOS received
Manager
Manager
avatar
Joined: 18 Mar 2010
Posts: 90
Location: United States
GMAT 1: Q V
Followers: 2

Kudos [?]: 26 [1] , given: 5

Re: m25 q14 [#permalink] New post 13 May 2010, 12:00
1
This post received
KUDOS
Not sure if my reasoning is correct, but this is what I got.

Draw a kite shape, with A being the top tip of the kite, and C being the bottom tip; B and D are opposite side corners. AC and BD (where the kite frame sticks would go) are perpendicular. And since all perfect kites are symmetric, then the sides AB=AD, and BC=CD, so AB+CD=BC+AD. But obviously AB does not equal BC. Or you would have a square kite. Answer is E.
Manager
Manager
avatar
Joined: 19 Oct 2011
Posts: 134
Location: India
Followers: 2

Kudos [?]: 165 [0], given: 33

Re: m25 q14 [#permalink] New post 18 Jul 2012, 17:36
Bunnel

Could you please explain statement wise why they are insufficient?

_________________

Encourage me by pressing the KUDOS if you find my post to be helpful.



Help me win "The One Thing You Wish You Knew - GMAT Club Contest"
the-one-thing-you-wish-you-knew-gmat-club-contest-140358.html#p1130989

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 22143
Followers: 3408

Kudos [?]: 24927 [1] , given: 2697

Re: m25 q14 [#permalink] New post 19 Jul 2012, 02:17
1
This post received
KUDOS
Expert's post
dvinoth86 wrote:
Bunnel

Could you please explain statement wise why they are insufficient?


If ABCD is a quadrilateral, is AB=BC=CD=DA ?

(1) AC is perpendicular to BD. The diagonals are perpendicular to each other: ABCD could be a kite (answer NO), a rhombus (answer YES) or a square, which is just a special type of rhombus (answer YES). Not sufficient.

(2) AB+CD=BC+DA. The sum of opposite sides are equal. Clearly insufficient.

(1)+(2) ABCD could be a kite (see the diagram below) - answer NO or a square/rhombus - answer YES. Not sufficient.

Answer: E.

Image

_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: m25 q14   [#permalink] 19 Jul 2012, 02:17
    Similar topics Author Replies Last post
Similar
Topics:
m09q14 Chetangupta 1 12 Jul 2011, 08:45
1 Experts publish their posts in the topic M10 Q#14 wininblue 10 29 Aug 2010, 08:55
M23 Q14 shalva 1 23 Feb 2010, 11:57
m06 q14 phillypointgod21 3 04 Jan 2010, 19:34
7 Experts publish their posts in the topic M03 Q14 LiveStronger 22 08 Nov 2008, 08:28
Display posts from previous: Sort by

m25 q14

  Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: Bunuel, WoundedTiger



cron

GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.