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# In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t

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In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t  [#permalink]

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Updated on: 12 Dec 2017, 20:12
2
2
00:00

Difficulty:

45% (medium)

Question Stats:

86% (01:50) correct 14% (02:24) wrong based on 18 sessions

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In the figure below, l1 and l2 intersect l3. Do l1 and l2 intersect to the right of l3?

(1) x > y
(2) x + y < 180

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xcxc.jpg [ 5.96 KiB | Viewed 447 times ]

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Last edited by Bunuel on 12 Dec 2017, 20:12, edited 1 time in total.
Edited the question.
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Joined: 02 Aug 2009
Posts: 7025
Re: In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t  [#permalink]

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12 Dec 2017, 17:29
3
In the figure below, l1 and l2 intersect l3. Do l1 and l2 intersect to the right of l3?

(1) x > y
(2) x + y < 180

A) the main point is that if X and y add up to less than 180 then these lines are slanting towards each other, so meet RIGHT of intersection.

B) if they add up to 180, they are parallel to each other, so DON'T meet

C) If they are more than 180 they are moving away from each other, so meet on the LEFT side.

Let's see what each statement tells us
1) x>y
If x is 40 and y is 30.... Case A.... YES
If x is 150 and y is 30....case B.. PARALLEL...NO
If x is140 and y is 100.....Case C...NO
Insuff..

2) x+y<180
So Case A.. YES
Sufficient

B
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3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

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Re: In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t &nbs [#permalink] 12 Dec 2017, 17:29
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