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Is x greater than y?

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Is x greater than y? [#permalink]

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New post 23 Jul 2013, 03:55
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Is x greater than y?

(1) x>2y
(2) x-y>0

[Reveal] Spoiler:
it is data sufficiency test, and i my answer is D but the answer says its B. anyone has any idea why?
[Reveal] Spoiler: OA

Last edited by Bunuel on 23 Jul 2013, 07:27, edited 1 time in total.
Renamed the topic and edited the question.
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Re: inequalities; data sufficiency [#permalink]

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New post 23 Jul 2013, 04:34
sudeepnkafle wrote:
is x greater than y?
(1). x>2y
(2). x-y>0

it is data sufficiency test, and i my answer is D but the answer says its B. anyone has any idea why?

statement 1:
\(x>2y\)
case 1:
let say \(x = 3\)
\(y= 1\)
clearly \(x > y and x > 2y\)
case 2:
let say\(x = -3 and y=-2\)
here \(x>2y\)...but \(x<y\)
hence this makes this option wrong.

statement 2:
\(x-y>0\)
clearly \(x>y\)===>suffocient.

hence B
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Re: inequalities; data sufficiency [#permalink]

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New post 23 Jul 2013, 05:39
sudeepnkafle wrote:
is x greater than y?
(1). x>2y
(2). x-y>0

it is data sufficiency test, and i my answer is D but the answer says its B. anyone has any idea why?


From F.S 1, we know that x>2y.

Now, if y>0, then we can plot the above as this on the number line : -----y -----2y------x----

Thus, x>y. However, if y<0, then ------2y---x--y------- or -----2y-----y------x---

Thus, Insufficient.

From F.S 2, we know that x>y as it is given in the statement. Sufficient.

B.
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Re: Is x greater than y? [#permalink]

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New post 21 Apr 2016, 21:04
Though its a good question ,but the tag should be changed.Its a 600-700 level question and not a 700 level.
Re: Is x greater than y?   [#permalink] 21 Apr 2016, 21:04
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