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19 Nov 2017, 23:47
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
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Question Stats:
81% (00:36) correct
19%
(00:40)
wrong
based on 174
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Lines m and n intersect, as shown in the figure above. What is the value of u - w?
(1) u = 90
(2) Lines m and n are perpendicular.
(A) Statement 1 alone is sufficient, but statement 2 alone is not.
(B) Statement 2 alone is sufficient, but statement 1 alone is not.
(C) Both statements together are sufficient, but neither alone is sufficient.
(D) Each statement alone is sufficient.
(E) Neither statement is sufficient, even when combined.
Attachment:
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20 Nov 2017, 00:13
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(1) If u = 90 it follows that w = 90, so the u-w=0
(2) Again, here we can deduce that u=w=90, thus u-w=0
Answer D
(2) Again, here we can deduce that u=w=90, thus u-w=0
Answer D
20 Nov 2017, 04:35
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Bunuel
D
u+w = 180
1) u = 90 so w =90
u-w = 0 Suff
2) perpendicular - at an angle of 90 u=w, u-w = 0 Suff
Don't know what happended to me... must have been tired. 
