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zakk
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if x and y are both integers and x>y, is x positive? 1) Updated on: 28 Jul 2007, 08:40
Originally posted by zakk on 27 Jul 2007, 18:56.
Last edited by zakk on 28 Jul 2007, 08:40, edited 2 times in total.
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if x and y are both integers and x>y, is x positive?

1) yx+y+4




I get how 1 is Insufficient, but not grasping 2.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
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sumande
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if x and y are both integers and x>y, is x positive? 1) 27 Jul 2007, 23:44
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zakk
if x and y are both integers and x>y, is x positive?

1) y<0>x+y+4

I get how 1 is Insufficient, but not grasping 2.
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Problem with HTML I think. Please repost after disabling HTML.
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sumande
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if x and y are both integers and x>y, is x positive? 1) 28 Jul 2007, 09:01
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zakk
if x and y are both integers and x>y, is x positive?

1) y<0
2) 2x+y+4>x+y+4

I get how 1 is Insufficient, but not grasping 2.
Show more


I think statement 2 is also insufficient.
2x+y+4 > x+y+4
can be written as
x + (x+y+4) > (x+y+4)

If (x+y+4) > 0, then x > 0.
But, if (x+y+4) < 0, then x > 0 or x <0.
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Himalayan
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if x and y are both integers and x>y, is x positive? 1) 28 Jul 2007, 09:12
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sumande
zakk
if x and y are both integers and x>y, is x positive?

1) y<0
2) 2x+y+4>x+y+4

I get how 1 is Insufficient, but not grasping 2.

I think statement 2 is also insufficient.
2x+y+4 > x+y+4
can be written as
x + (x+y+4) > (x+y+4)

If (x+y+4) > 0, then x > 0.
But, if (x+y+4) < 0, then x > 0 or x <0.
Show more


B. st 2 should be sufficient:

2x + y + 4 > x + y + 4
2x > x
2x - x > 0
x > 0
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sumande
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if x and y are both integers and x>y, is x positive? 1) 28 Jul 2007, 10:31
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Himalayan
sumande
zakk
if x and y are both integers and x>y, is x positive?

1) yx+y+4

I get how 1 is Insufficient, but not grasping 2.

I think statement 2 is also insufficient.
2x+y+4 > x+y+4
can be written as
x + (x+y+4) > (x+y+4)

If (x+y+4) > 0, then x > 0.
But, if (x+y+4) 0 or x x + y + 4
2x > x
2x - x > 0
x > 0
Show more


You are right. I don't know what I was thinking. :oops:



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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