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If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20

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If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 17 Jul 2011, 22:36
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If x - y > 10, is x - y > x + y ?

(1) x = 8
(2) y = -20

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-x-y-10-is-x-y-x-y-105185.html
[Reveal] Spoiler: OA
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 17 Jul 2011, 23:06
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siddhans wrote:
if x-y > 10 , is x -y > x+ y?

1)x=8

2) y =- 20


Hello,

1. X = 8 ,
then 8 - Y > 10
-Y > 2
Y < -2

Substitute the values ==>
8-(-3) > 8 - 3 => 11 > 5 Sufficient(1)

2. Y = -20
then X - Y > 10
X + 20 > 10
X + 20 - 20 > 10 - 20
X > -20

Now, Substitute the values ==>
-21 + 20 > -21 -20
-1 > - 41 ==> Sufficient(2)

There, (D)

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Mustu
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 18 Jul 2011, 03:40
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siddhans wrote:
if x-y > 10 , is x -y > x+ y?

1)x=8

2) y =- 20


To prove: x-y>x+y
or x-y-x-y>0
or -2y>0
or y<0 ?

Stmt1: x=8
x-y > 10
8-y>10
-2-y>0
2+y<0
y<-2
Hence y < 0. Sufficient.

Stmt2: y=-20
Hence y <0. Sufficient.

OA D.
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 18 Jul 2011, 05:48
both are sufficient....D is answer
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 04 Aug 2014, 06:27
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20 [#permalink] New post 12 Aug 2014, 02:21
Expert's post
If x - y > 10, is x - y > x + y ?

Given: x-y>10.
Question: is x-y>x+y? --> is 2y<0? --> is y<0?

(1) x=8 --> 8-y>10 --> y<-2, hence y<0. Sufficient.

(2) y=-20, hence y<0. Sufficient.

Answer: D.

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-x-y-10-is-x-y-x-y-105185.html[/quote]
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Re: If x - y > 10, is x - y > x + y ? (1) x = 8 (2) y = -20   [#permalink] 12 Aug 2014, 02:21
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