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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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New post Updated on: 12 Dec 2017, 20:12
2
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A
B
C
D
E

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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

Attachment:
xcxc.jpg
xcxc.jpg [ 5.96 KiB | Viewed 447 times ]

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Originally posted by SajjadAhmad on 12 Dec 2017, 10:16.
Last edited by Bunuel on 12 Dec 2017, 20:12, edited 1 time in total.
Edited the question.
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Re: In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t  [#permalink]

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New post 12 Dec 2017, 17:29
3
SajjadAhmad wrote:
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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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
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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In the figure above, l1 and l2 intersect l3. Do l 1 and l2 intersect t

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