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If the product of j and k does not equal zero, is j<0 and k>0?

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If the product of j and k does not equal zero, is j<0 and k>0? [#permalink]

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New post 24 Sep 2017, 11:25
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

67% (01:10) correct 33% (00:53) wrong based on 15 sessions

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If the product of j and k does not equal zero, is j<0 and k>0?

(1) (-j, k) lies above the x-axis and to the right of the y-axis.
(2) (j, -k) lies below the x-axis and to the left of the y-axis.
[Reveal] Spoiler: OA

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Re: If the product of j and k does not equal zero, is j<0 and k>0? [#permalink]

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New post 24 Sep 2017, 13:34
SajjadAhmad wrote:
If the product of j and k does not equal zero, is j<0 and k>0?

(1) (-j, k) lies above the x-axis and to the right of the y-axis.
(2) (j, -k) lies below the x-axis and to the left of the y-axis.


The answer should be D as follows.

(1) (-j, k) lies above the x-axis and to the right of the y-axis. : This gives unique position of the point, hence the unique value for both j and k - Sufficient

(2) (j, -k) lies below the x-axis and to the left of the y-axis: This also gives unique position of the point, hence the unique value for both j and k - Sufficient

Hence answer is D
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Re: If the product of j and k does not equal zero, is j<0 and k>0? [#permalink]

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New post 24 Sep 2017, 14:13
SajjadAhmad wrote:
If the product of j and k does not equal zero, is j<0 and k>0?

(1) (-j, k) lies above the x-axis and to the right of the y-axis.
(2) (j, -k) lies below the x-axis and to the left of the y-axis.


Statement 1 means that (-j,k) lies on the specific quadrant : Q IV. Sufficient.
Statement 2 means that (j,-k) lies on the specific quadrant : Q III. Sufficient.

D.
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Re: If the product of j and k does not equal zero, is j<0 and k>0?   [#permalink] 24 Sep 2017, 14:13
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