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kyatin
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OAs 1 -> C 2 -> E 28 Apr 2008, 09:59
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OAs 1 -> C 2 -> E 28 Apr 2008, 11:40
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kyatin
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a)

1 ) p-q > n

you can put it as p >q+n ; insuff no information about n , n could be +ve or -ve

2) q>p ; doesn't give us information about n at all ; insuff

combining the both if p>q+n and q>p ; n has to be -ve and given that p and q are both positive we know n is < p and q both .

-------------------------------------------------------

b)


1) doesn't give information about y intercept -insuff
2) doesn't give information about y intercept again so insuff . it just tells us slope is downward passing from II quadrant to iV quadrant or passing from IInd quadrant to IIIrd quadrant .

so answer should be E

I think what will make this sufficient is either information about y intercept or any x,y coordinate of line k , any thoughts anyone?
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OAs 1 -> C 2 -> E 28 Apr 2008, 12:00
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kyatin
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2 -> E
a)

1 ) p-q > n

you can put it as p >q+n ; insuff no information about n , n could be +ve or -ve

2) q>p ; doesn't give us information about n at all ; insuff

combining the both if p>q+n and q>p ; n has to be -ve and given that p and q are both positive we know n is < p and q both .

-------------------------------------------------------

b)


1) doesn't give information about y intercept -insuff
2) doesn't give information about y intercept again so insuff . it just tells us slope is downward passing from II quadrant to iV quadrant or passing from IInd quadrant to IIIrd quadrant .

so answer should be E

I think what will make this sufficient is either information about y intercept or any x,y coordinate of line k , any thoughts anyone?
Show more


On Circle-line question, I though C. But I see my mistake. X intercept "greater" than one is pretty much useless info. Cant be used to determine a unique line.
I thought if slope is given which is -1/10 then X intercept being more than 1 means Y intercept has to be greater than 10 ( is that good assumption?). I was not sure if such line having X intercept greater than 1 and Y intercept greater than 10, would intersect circle of radius 1. Any thoughts on that?
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OAs 1 -> C 2 -> E 28 Apr 2008, 12:00
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kyatin,

Please separate and post one question at a time. In conjunction with the other question, I am confused out of my mind :P

1 at a time please.
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OAs 1 -> C 2 -> E 28 Apr 2008, 13:07
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Quote:
On Circle-line question, I though C. But I see my mistake. X intercept "greater" than one is pretty much useless info. Cant be used to determine a unique line.
I thought if slope is given which is -1/10 then X intercept being more than 1 means Y intercept has to be greater than 10 ( is that good assumption?). I was not sure if such line having X intercept greater than 1 and Y intercept greater than 10, would intersect circle of radius 1. Any thoughts on that?
Show more

x intercept being more than one and slope = -1/10 will not give us enuf information about y intecept

take this example

let's assume x intercept = 2
y=mx+b
0=(-1/10)*2+b ; b = 0.2 , so yes line will intersect circle

let's assume x intercept =20
0=(-1/10)*20+b b=2 ; line will not intersect circle .

Hope that helps .....
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kyatin
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OAs 1 -> C 2 -> E 28 Apr 2008, 13:37
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rpmodi
Quote:
On Circle-line question, I though C. But I see my mistake. X intercept "greater" than one is pretty much useless info. Cant be used to determine a unique line.
I thought if slope is given which is -1/10 then X intercept being more than 1 means Y intercept has to be greater than 10 ( is that good assumption?). I was not sure if such line having X intercept greater than 1 and Y intercept greater than 10, would intersect circle of radius 1. Any thoughts on that?

x intercept being more than one and slope = -1/10 will not give us enuf information about y intecept

take this example

let's assume x intercept = 2
y=mx+b
0=(-1/10)*2+b ; b = 0.2 , so yes line will intersect circle

let's assume x intercept =20
0=(-1/10)*20+b b=2 ; line will not intersect circle .

Hope that helps .....
Show more

I saw my mistake , another one.

m = \(\frac{\Delta y}{\Delta x}\)

and NOT \(\frac{\Delta x}{\Delta y}\)

That was great....dont know why I just dint plug in the numbers. :twisted:



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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