|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
01 Mar 2022, 03:00
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:32) correct
17%
(02:08)
wrong
based on 63
sessions
History
Date
Time
Result
Not Attempted Yet
In the figure above, ℓ1 is parallel to ℓ2 and ℓ2 is parallel to ℓ3. What is the value of a + b + c + d + e?
A. 180
B. 270
C. 360
D. 450
E. It cannot be determined from the information given
Attachment:
2018-12-25_1334.png [ 5.98 KiB | Viewed 4235 times ]
01 Mar 2022, 08:42
Kudos
Bookmarks
Bunuel
When a line (aka transversal) intersect parallel lines, we get several pairs of angles that add to 180°:
So, from the given diagram, we can see that a + b = 180°, and c + d = 180°
So we get: a + b + c + d + e = (a + b) + (c + d) + e = 180 + 180 + e
Since we have no way of determining the value of e, the correct answer is E
01 Mar 2022, 10:49
Kudos
Bookmarks
We have no information about the sloping line, and if it were rising very gradually as it moves right (so if, imagining it's a line in the xy-plane, it had a positive slope very close to zero), the three angles b, c and e would each be nearly 180 degrees, and would sum to nearly 540. So E is the only answer that could conceivably be right.
