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is x less than y? 1. x-y+1<0 2. x-y-1<0

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Manager
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Joined: 05 Sep 2007
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is x less than y? 1. x-y+1<0 2. x-y-1<0 [#permalink] New post 02 Mar 2008, 16:33
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is x less than y?
1. x-y+1<0
2. x-y-1<0
SVP
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Joined: 28 Dec 2005
Posts: 1594
Followers: 2

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Re: DS: x and y [#permalink] New post 02 Mar 2008, 18:59
isnt it A ?

stat 1 can be rearranged to give x<y-1. If y is positive, or zero, x is always less than y. If y is negative, x will be less than y. If y is a fraction (positive or negative), x will be less than y.
Manager
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Re: DS: x and y [#permalink] New post 02 Mar 2008, 20:31
The answer is A

(1) x-y+1<0 => y-x>1>0 => y>x suff
Let's take y = -4, x <-5
y= 2, x<1

(2) x-y <1,if x=1, y =1/3 => 2/3 <1 but x>y
x=1, y =2 => -1<1 and x<y
not suff
Re: DS: x and y   [#permalink] 02 Mar 2008, 20:31
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