GMAT Question of the Day - Daily to your Mailbox; hard ones only
close

It is currently 11 Dec 2018, 01:09
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar

  • Free GMAT Prep Hour

     December 11, 2018

     December 11, 2018

     09:00 PM EST

     10:00 PM EST

    Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.
    GMAT: Verbal | GMAT: Quantitative | Free

  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
    GMAT: Verbal | GMAT: Quantitative | Free
CLICK HERE TO HIDE/SHOW EVENTS

If BC = BD, what is the length of BC?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Intern
Intern
avatar
Joined: 10 Apr 2014
Posts: 33
If BC = BD, what is the length of BC?  [#permalink]

Show Tags

New post 12 Apr 2014, 10:27
1
2
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

48% (01:42) correct 52% (01:49) wrong based on 132 sessions

HideShow timer Statistics

Image
If BC = BD, what is the length of BC?

(1) x = 30
(2) AD = 1


Spoiler: ::
Attachment:
DS1.png
DS1.png [ 11.15 KiB | Viewed 3045 times ]
Spoiler: OA
Retired Moderator
avatar
B
Joined: 17 Sep 2013
Posts: 340
Concentration: Strategy, General Management
Schools: Duke '18 (D), Kelley '18 (M), ISB '17 (D), Goizueta '18 (D), Owen '17 (I), Mendoza '18 (WL)
GMAT 1: 730 Q51 V38
WE: Analyst (Consulting)
GMAT ToolKit User Premium Member Reviews Badge
Re: If BC = BD, what is the length of BC?  [#permalink]

Show Tags

New post 12 Apr 2014, 15:21
3
ind23 wrote:
If BC = BD, what is the length of BC?

1) x = 30
2) AD = 1


An easy one..just assign x to Angle-BDC & Angle-BCD..keep on applying the Sum of all angles is 180 rule until you get all the angles in terms of x
You get
-->Angle DAB = Angle DBA = 2x
--> AD = BD

As BD=BC
--> AD=BD=BC=1
As given in B
So B it is

Kudos if I helped..
_________________

Appreciate the efforts...KUDOS for all
Don't let an extra chromosome get you down..:P

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51096
Premium Member
Top Member of the Month
If BC = BD, what is the length of BC?  [#permalink]

Show Tags

New post 13 Apr 2014, 05:56
1
Image
If BC = BD, what is the length of BC?

Look at the diagram below:
Image
As you can see fro the stem we can get that \(\angle{DBA\angle{DAB}=2x\), from which it follows that AD = BD, thus AD = BD = BC.

(1) x = 30. This statement must be insufficient, because we are asked to find the length and all we know are angles. Not sufficient

(2) AD = 1 --> we know that AD = BC, thus BC = 1. Sufficient.

Answer: B.

Hope it's clear.

Spoiler: ::
Attachment:
Untitled.png
Untitled.png [ 12.22 KiB | Viewed 2593 times ]

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

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?
Extra-hard Quant Tests with Brilliant Analytics

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9103
Premium Member
Re: If BC = BD, what is the length of BC?  [#permalink]

Show Tags

New post 14 Aug 2018, 02:04
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: If BC = BD, what is the length of BC? &nbs [#permalink] 14 Aug 2018, 02:04
Print view
First unread post
Display posts from previous: Sort by

If BC = BD, what is the length of BC?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Bunuel, VeritasKarishma, gmatbusters, amanvermagmat

Search for:


Copyright

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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions