It is currently 18 Jan 2018, 12:07

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

In the figure above, ABC is an equilateral triangle and BDC is an isos

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 43323

Kudos [?]: 139428 [0], given: 12790

In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 24 Aug 2017, 01:09
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

81% (00:49) correct 19% (00:43) wrong based on 65 sessions

HideShow timer Statistics

Image
In the figure above, ABC is an equilateral triangle and BDC is an isosceles triangle. If x = 47, what is the value of y?

(A) 13
(B) 23
(C) 30
(D) 47
(E) 53

[Reveal] Spoiler:
Attachment:
2017-08-24_1251_001.png
2017-08-24_1251_001.png [ 12.68 KiB | Viewed 1550 times ]
[Reveal] Spoiler: OA

_________________

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

Kudos [?]: 139428 [0], given: 12790

Director
Director
User avatar
P
Joined: 18 Aug 2016
Posts: 627

Kudos [?]: 208 [0], given: 166

Concentration: Strategy, Technology
GMAT 1: 630 Q47 V29
GMAT 2: 740 Q51 V38
GMAT ToolKit User Premium Member Reviews Badge
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 24 Aug 2017, 01:34
Bunuel wrote:
Image
In the figure above, ABC is an equilateral triangle and BDC is an isosceles triangle. If x = 47, what is the value of y?

(A) 13
(B) 23
(C) 30
(D) 47
(E) 53

[Reveal] Spoiler:
Attachment:
2017-08-24_1251_001.png

angle DBC = angle DCB = x = 47 (BDC is isosceles triangle)
angle ABC = 60 (ABC is equilateral triangle)
y = angle ABD = ABC - DBC = 60-47 = 13

A
_________________

We must try to achieve the best within us


Thanks
Luckisnoexcuse

Kudos [?]: 208 [0], given: 166

Intern
Intern
avatar
B
Joined: 13 Jul 2015
Posts: 21

Kudos [?]: 1 [0], given: 1

Re: In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 24 Aug 2017, 01:45
Ans : a

ABC is an equilateral triangle.

thus angle ABC=60 degree.

Traingle DBC is isosceles triangle .

Thus Angle DBC=47degree as DCB = 47.

Thus angle ABD = 60-47= 13 degree

Kudos [?]: 1 [0], given: 1

VP
VP
avatar
P
Joined: 22 May 2016
Posts: 1247

Kudos [?]: 458 [0], given: 681

Premium Member CAT Tests
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 24 Aug 2017, 05:33
Bunuel wrote:
Image
In the figure above, ABC is an equilateral triangle and BDC is an isosceles triangle. If x = 47, what is the value of y?

(A) 13
(B) 23
(C) 30
(D) 47
(E) 53

[Reveal] Spoiler:
Attachment:
2017-08-24_1251_001.png

1. x + y = measure of angle B

Small triangle BCD is isosceles.

Sides BD and BC are equal; angles opposite those sides are equal. Both small angles of triangle BCD = x

2. Equilateral triangle angles A, B, and C all = 60

3. Angle B = 60 = x + y (from #1)
x = 47
60 - 47 = 13 = y

Answer A
_________________

At the still point, there the dance is. -- T.S. Eliot
Formerly genxer123

Kudos [?]: 458 [0], given: 681

Manager
Manager
User avatar
G
Joined: 27 Dec 2016
Posts: 232

Kudos [?]: 55 [0], given: 249

Concentration: Social Entrepreneurship, Nonprofit
GPA: 3.65
WE: Sales (Consumer Products)
Premium Member Reviews Badge
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 24 Aug 2017, 09:10
Bunuel wrote:
Image
In the figure above, ABC is an equilateral triangle and BDC is an isosceles triangle. If x = 47, what is the value of y?

(A) 13
(B) 23
(C) 30
(D) 47
(E) 53

[Reveal] Spoiler:
Attachment:
2017-08-24_1251_001.png


1. If X = 47, so the angle in front of this angle will be equal to 47.
2. Since ABC is an equilateral triangle, so each angle should be 60 degrees.
3. 60-47 = 13.

A
_________________

There's an app for that - Steve Jobs.

Kudos [?]: 55 [0], given: 249

Senior Manager
Senior Manager
User avatar
G
Joined: 29 Jun 2017
Posts: 439

Kudos [?]: 89 [0], given: 73

GPA: 4
WE: Engineering (Transportation)
GMAT ToolKit User
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos [#permalink]

Show Tags

New post 11 Sep 2017, 12:12
Bunuel wrote:
Image
In the figure above, ABC is an equilateral triangle and BDC is an isosceles triangle. If x = 47, what is the value of y?

(A) 13
(B) 23
(C) 30
(D) 47
(E) 53

[Reveal] Spoiler:
Attachment:
2017-08-24_1251_001.png


Angle DBC = x
x+y = 60
y=60-47
y = 13
Option A
_________________

Give Kudos for correct answer and/or if you like the solution.

Kudos [?]: 89 [0], given: 73

Re: In the figure above, ABC is an equilateral triangle and BDC is an isos   [#permalink] 11 Sep 2017, 12:12
Display posts from previous: Sort by

In the figure above, ABC is an equilateral triangle and BDC is an isos

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


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.