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21 Oct 2019, 01:51
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
61% (02:48) correct
39%
(02:34)
wrong
based on 99
sessions
History
Date
Time
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Not Attempted Yet
[GMAT math practice question]
In the figure, what is \(∠a + ∠b + ∠c + ∠d + ∠e - ∠f + ∠g\)?
\(A. 270^o\)
\(B. 300^o\)
\(C. 330^o\)
\(D. 360^o\)
\(E. 420^o\)
10.21PS.png [ 20.59 KiB | Viewed 3112 times ]
In the figure, what is \(∠a + ∠b + ∠c + ∠d + ∠e - ∠f + ∠g\)?
\(A. 270^o\)
\(B. 300^o\)
\(C. 330^o\)
\(D. 360^o\)
\(E. 420^o\)
Attachment:
10.21PS.png [ 20.59 KiB | Viewed 3112 times ]
21 Oct 2019, 02:11
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MathRevolution
Logically
We are NOT dealing with any angles but triangles and quadrilateral, so our answer has to be in multiple of 180...ONLY possibility 360
As lines are parallel, we can check for corresponding angles to get a+b in triangle with g...
look at the attached figure..
\(180-x-f=180-(a+b+g)......a+b+g=f+x....\).Now \(x=360-(a+b+c).....a+b+g=f+360-c-d-e...a+b+c+d+e-f+g=360\)
D
Attachments
10.21PS.png [ 21.26 KiB | Viewed 3054 times ]
