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vd
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DS question 03 Jun 2008, 22:45
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I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help



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alpha_plus_gamma
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DS question 03 Jun 2008, 22:54
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vdhawan1
I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help
Show more

I believe the answer to be C.

1) alone is clearly insuff.

2) y can be either positive or negative

Together, since N lies on the circumference, for x=12 there will be only one y in first quadrant.
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vd
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DS question 03 Jun 2008, 22:58
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alpha_plus_gamma
vdhawan1
I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help

I believe the answer to be C.

1) alone is clearly insuff.

2) y can be either positive or negative

Together, since N lies on the circumference, for x=12 there will be only one y in first quadrant.
Show more

i dont understand this statement

Together, since N lies on the circumference, for x=12 there will be only one y in first quadrant.

how are we sure that there will be one y in the first quadrant

am i missing something here
thanks
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rohit929
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DS question 03 Jun 2008, 23:53
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vdhawan1
alpha_plus_gamma
vdhawan1
I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help

I believe the answer to be C.

1) alone is clearly insuff.

2) y can be either positive or negative

Together, since N lies on the circumference, for x=12 there will be only one y in first quadrant.

i dont understand this statement

Together, since N lies on the circumference, for x=12 there will be only one y in first quadrant.

how are we sure that there will be one y in the first quadrant

am i missing something here
thanks
Show more

well equation of circle with center at orifin and radius r is \(x^2\)+\(y^2\)=\(r^2\)----(1)

from 1) point is in first quadrant(insuff)

from 2)x co ordinate of the number is 12
substitute in (1)
we can get value of y co ordinate but it can be positive or negative
combining we get the ans
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buffdaddy
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DS question 04 Jun 2008, 10:41
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vdhawan1
I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help
Show more

Anytime u see the ratios 3,4,5 5,12,13 on a gmat, a right triangle should come to mind.

so a point (-12,-5) will be 13 away from the origin, making this point on the circumference

now lets look at the statements

1) not enough info,
2)point could be (12,-5) or (12,5) insuff.

1)2) enough info, point is (12,5) so length must be radius = 13

C
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GMATBLACKBELT
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DS question 04 Jun 2008, 11:00
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vdhawan1
I think the answer to this question is E
Here is my reasoning for the same
From statement 1, we don’t know as to what is the exact positioning of N, there are a number of options which are possible, therefore statement 1 is insufficient

From statement 2, we only come to know that x coordinate of N is 12 but what is the Y coordinate hence insufficient

Both statements put together don’t help
Show more

Answer is C.

Since we know the radius is 13. At X=12. We should beable to know where the Y coordinate is. Since we know its in the first quadrant.

We know the distance.



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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