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x and y are consecutive positive integers and: x>y,

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TAGS:
Joined: 31 Dec 1969
Location: United States
Concentration: Marketing, Other
GMAT 1: 710 Q49 V38
GMAT 2: 660 Q V
GPA: 3.64
WE: Accounting (Accounting)
Followers: 0

Kudos [?]: 65 [0], given: 76920

CAT Tests
x and y are consecutive positive integers and: x>y, [#permalink] New post 18 Jun 2008, 15:38
x and y are consecutive positive integers and: x>y, x^2-1> y^2-4y+x-1

Which of the following represents all the possible values of y?
y>=0
y>0
y>1
y>7
y>8

*May have been asked before but couldn't find it on the board. Not sure why A is not right. When I plugged in numbers that seems to be fine.
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Joined: 28 Dec 2004
Posts: 3405
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 159 [0], given: 2

GMAT Tests User
Re: Number Properties - consecutive integers [#permalink] New post 18 Jun 2008, 16:39
jlola21 wrote:
x and y are consecutive positive integers and: x>y, x^2-1> y^2-4y+x-1

Which of the following represents all the possible values of y?
y>=0
y>0
y>1
y>7
y>8

*May have been asked before but couldn't find it on the board. Not sure why A is not right. When I plugged in numbers that seems to be fine.


OK so we are told that x=y+1..

(y+1)^2=y^2+2y>y^2-3y
i get 2y>-3y

as long as y>0 then we should be OK..
Joined: 31 Dec 1969
Location: United States
Concentration: Marketing, Other
GMAT 1: 710 Q49 V38
GMAT 2: 660 Q V
GPA: 3.64
WE: Accounting (Accounting)
Followers: 0

Kudos [?]: 65 [0], given: 76920

CAT Tests
Re: Number Properties - consecutive integers [#permalink] New post 18 Jun 2008, 17:16
I'm realizing I have issues reading problems correctly considering I completely missed the whole "positive" word in the question! Thanks for your time.
Re: Number Properties - consecutive integers   [#permalink] 18 Jun 2008, 17:16
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x and y are consecutive positive integers and: x>y,

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