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

 It is currently 26 Apr 2019, 00:58

### 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

# 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

Math Expert
Joined: 02 Sep 2009
Posts: 54544
In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

24 Aug 2017, 02:09
00:00

Difficulty:

15% (low)

Question Stats:

98% (00:56) correct 2% (00:41) wrong based on 76 sessions

### HideShow timer Statistics

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

Attachment:

2017-08-24_1251_001.png [ 12.68 KiB | Viewed 5638 times ]

_________________
Current Student
Joined: 18 Aug 2016
Posts: 619
Concentration: Strategy, Technology
GMAT 1: 630 Q47 V29
GMAT 2: 740 Q51 V38
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

24 Aug 2017, 02:34
Bunuel wrote:

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

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
Intern
Joined: 13 Jul 2015
Posts: 19
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

24 Aug 2017, 02:45
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
Senior SC Moderator
Joined: 22 May 2016
Posts: 2654
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

24 Aug 2017, 06:33
Bunuel wrote:

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

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
_________________
Listen, are you breathing just a little, and calling it a life?
-- Mary Oliver

For practice SC questions with official explanations that were posted and moderated by the SC Team,
go to SC Butler here: https://gmatclub.com/forum/project-sc-butler-get-2-sc-questions-everyday-281043.html
Manager
Joined: 27 Dec 2016
Posts: 232
Concentration: Marketing, Social Entrepreneurship
GPA: 3.65
WE: Marketing (Education)
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

24 Aug 2017, 10:10
Bunuel wrote:

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

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.
Senior Manager
Joined: 29 Jun 2017
Posts: 454
GPA: 4
WE: Engineering (Transportation)
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos  [#permalink]

### Show Tags

11 Sep 2017, 13:12
Bunuel wrote:

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

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.
Re: In the figure above, ABC is an equilateral triangle and BDC is an isos   [#permalink] 11 Sep 2017, 13:12
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

 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®.