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Kaplan DS Is x − y positive? (1) x > y is negative.

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Kaplan DS Is x − y positive? (1) x > y is negative. [#permalink] New post 14 Dec 2003, 04:19
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Kaplan DS

Is x − y positive?

(1) x > y is negative.

(2) y − x is negative.


Is there a problem with (1). can this be solved as is.
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 [#permalink] New post 14 Dec 2003, 04:37
There is a contradiction in 1) if x>y then x-y>0 how can this be negative..on other hand 2) is sufficient
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 [#permalink] New post 14 Dec 2003, 05:37
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2 is definitely sufficient.

1 can be interpreted as x > y is negative; so it means that x < y

official ans and explanation pls!
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 [#permalink] New post 17 Dec 2003, 17:34
How can 2 be sufficient?

If you take y=3 and x=5 then y-x=-2 (negative) and x-y=2 which is positive
If you take y=-3 and x=-2 then y-x =-1 (negative) but x-y=-5 which is negative
Thus, 2 alone in NOT sufficient
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 [#permalink] New post 18 Dec 2003, 04:16
how can an inequality be negative?
  [#permalink] 18 Dec 2003, 04:16
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Kaplan DS Is x &#8722; y positive? (1) x > y is negative.

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