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Is X>Y? 1. x=y+2 2. x/2=y-1

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Is X>Y? 1. x=y+2 2. x/2=y-1 [#permalink]

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New post 09 Aug 2008, 20:10
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Is X>Y?

1. x=y+2
2. x/2=y-1

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SVP
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Re: DS: Equalities [#permalink]

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New post 09 Aug 2008, 20:38
vksunder wrote:
Is X>Y?

1. x=y+2
2. x/2=y-1


A.

1: if x = y +2, x is always > y.

2: x/2 = y-1
x = 2y - 2

x could be >y or < y.
nsf
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Re: DS: Equalities [#permalink]

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New post 09 Aug 2008, 21:21
1) Sufficient.
2) May be case. x = 2Y - 2. y=1, x= 0 so x<y or y=10,x=18 x>y

Answer A.

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Re: DS: Equalities [#permalink]

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New post 10 Aug 2008, 06:05
vksunder wrote:
Is X>Y?

1. x=y+2
2. x/2=y-1


(1) x-2 >y => x>y always SUFFI
(2)x/2 +1 =y ycan be equal or less or greater than x

at x=2 ,y=x
at x=1 ,y>x
at x=3,y<x
INSUFFI

IMO A
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Re: DS: Equalities [#permalink]

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New post 10 Aug 2008, 10:04
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vksunder wrote:
Is X>Y?

1. x=y+2
2. x/2=y-1


Q : yellow area
Statement 1 : blue line
statement 2 : red line

Answer A
Attachment:
xylines.PNG
xylines.PNG [ 17.08 KiB | Viewed 1180 times ]

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Re: DS: Equalities [#permalink]

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New post 10 Aug 2008, 10:09
vksunder wrote:
Is X>Y?

1. x=y+2
2. x/2=y-1


A)

For statement 2) y=0 and y =2 gives x<y and x>y

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Re: DS: Equalities [#permalink]

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New post 12 Aug 2008, 08:05
durgesh79 wrote:
vksunder wrote:
Is X>Y?

1. x=y+2
2. x/2=y-1


Q : yellow area
Statement 1 : blue line
statement 2 : red line

Answer A
Attachment:
xylines.PNG


Hi Durgesh,

Your approach is interesting..

How to draw the question line.?? can you elaborate
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Re: DS: Equalities [#permalink]

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New post 12 Aug 2008, 09:23
x2suresh wrote:

Hi Durgesh,

Your approach is interesting..

How to draw the question line.?? can you elaborate


draw x = y,

all the points to right of this line will satify x>y ...
how do we know that... well just take any point which is on the right side ... say (1,0) --- 1>0 true
take any point on the left side of line (-1,0) --- x is not greater than y -- false..
so our target area is all the points to the right of line x=y.

Last edited by durgesh79 on 12 Aug 2008, 10:00, edited 1 time in total.

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Re: DS: Equalities [#permalink]

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New post 13 Aug 2008, 04:40
good approach :-D

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Re: DS: Equalities   [#permalink] 13 Aug 2008, 04:40
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