Last visit was: 12 Sep 2026, 23:59 It is currently 12 Sep 2026, 23:59
Home
Messages
Tests
Schools
Events
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
Back to Forum
Create Topic
Sub 505 (Easy)|   Geometry|      
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 12 Sep 2026
Posts: 113,479
Own Kudos:
840,929
 [4]
Given Kudos: 111,485
Products:
GMAT Club Tests
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,479
Kudos: 840,929
 [4]
In quadrilateral ABCD, what is the value of angle ADC? 19 Oct 2020, 00:15
1
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

83% (01:07) correct 17% (01:29) wrong based on 148 sessions

History

Date
Time
Result
Not Attempted Yet
In quadrilateral ABCD, what is the value of angle ADC?

(1) Angle BAD + Angle ABC + Angle BCD = 280
(2) Angle BAD + Angle ADC + Angle BCD = 300




Project DS Butler Data Sufficiency (DS3)


For DS butler Questions Click Here
ShowHide Answer
Official Answer
A
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
User avatar
VoltAmpere
User avatar
Joined: 10 Mar 2020
Last visit: 23 Dec 2021
Posts: 56
Own Kudos:
46
 [1]
Given Kudos: 63
Posts: 56
Kudos: 46
 [1]
In quadrilateral ABCD, what is the value of angle ADC? 19 Oct 2020, 00:26
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Sum of internal angles of quadrilaterals is 360
In quadrilateral ABCD

Angle BAD + Angle ABC + Angle BCD +angle ADC=360

(1) Angle BAD + Angle ABC + Angle BCD = 280
Angle ADC=360-280=80
SUFFICIENT

(2) Angle BAD + Angle ADC + Angle BCD = 300
Angle ABC=360-300=60
We cannot determine the other angles since the type of quadrilateral is not given. It may be a trapezoid or parallelogram.
INSUFFICIENT.

IMO CORRECT ANSWER IS A

Posted from my mobile device
User avatar
alwaysHP
User avatar
Current Student
Joined: 16 Aug 2018
Last visit: 30 Jun 2023
Posts: 84
Own Kudos:
94
 [2]
Given Kudos: 503
Location: India
Schools: Carlson '23 (S) Goizueta "23 (S) McDonough'23 (S) Tepper '23 (WL) Marshall'23 (I)
GMAT 1: 600 Q44 V31
GMAT 2: 710 Q49 V38
GRE 1: Q162 V150
GPA: 3.33
Schools: Carlson '23 (S) Goizueta "23 (S) McDonough'23 (S) Tepper '23 (WL) Marshall'23 (I)
GMAT 2: 710 Q49 V38
GRE 1: Q162 V150
Posts: 84
Kudos: 94
 [2]
In quadrilateral ABCD, what is the value of angle ADC? 19 Oct 2020, 03:56
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
In quadrilateral ABCD

Angle BAD + Angle ABC + Angle BCD +angle ADC=360
Sum of angles is 360
(1) Angle BAD + Angle ABC + Angle BCD = 280

Angle ADC=360-280=80


(2) Angle BAD + Angle ADC + Angle BCD = 300
Not possible to find ADC here
User avatar
PrashantK0099
User avatar
Joined: 09 Sep 2020
Last visit: 27 Oct 2020
Posts: 59
Own Kudos:
46
 [2]
Given Kudos: 45
Location: United States
Concentration: Finance, General Management
Posts: 59
Kudos: 46
 [2]
In quadrilateral ABCD, what is the value of angle ADC? 19 Oct 2020, 04:35
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
A : sum of three angle is given and asking 4 th discrete angle : Sufficicient .

B : sum of 3 angle given , we dont know about other 2 : Hence Not sufficient

Cleary A.
avatar
RamTee
avatar
Joined: 15 Aug 2020
Last visit: 04 Jun 2021
Posts: 9
Own Kudos:
15
 [1]
Given Kudos: 78
Location: India
Schools: Haas '23 Stanford '23 Kellogg '23
WE:Consulting (Non-Profit and Government)
Schools: Haas '23 Stanford '23 Kellogg '23
Posts: 9
Kudos: 15
 [1]
In quadrilateral ABCD, what is the value of angle ADC? 20 Oct 2020, 01:30
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Quadrilateral's sum is always 360.

In option 1, they give sum of all three angles except ADC hence Option A is sufficient via 360-280 (80 degrees).

In Option 2, they give sum of all three angles but includes ADC as part of 300 degrees. With purely that knowledge, we cant calculate ADC hence option B is not sufficient.
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,230
Own Kudos:
1,158
Posts: 39,230
Kudos: 1,158
In quadrilateral ABCD, what is the value of angle ADC? 29 Jul 2023, 18:29
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderator:
Bunuel
Math Expert
113479 posts