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

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Joined: 31 Dec 1969

Kudos [?]: [0], given:

Location: Russian Federation
Concentration: Entrepreneurship, International Business
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 9: 740 Q49 V42
GMAT 11: 500 Q47 V33
GMAT 14: 760 Q49 V44
WE: Supply Chain Management (Energy and Utilities)
x and y are consecutive positive integers and: x>y, [#permalink]

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New post 18 Jun 2008, 16:38
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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: 3345

Kudos [?]: 322 [0], given: 2

Location: New York City
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Re: Number Properties - consecutive integers [#permalink]

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New post 18 Jun 2008, 17:39
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..

Kudos [?]: 322 [0], given: 2

Joined: 31 Dec 1969

Kudos [?]: [0], given:

Location: Russian Federation
Concentration: Entrepreneurship, International Business
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 9: 740 Q49 V42
GMAT 11: 500 Q47 V33
GMAT 14: 760 Q49 V44
WE: Supply Chain Management (Energy and Utilities)
Re: Number Properties - consecutive integers [#permalink]

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New post 18 Jun 2008, 18:16
I'm realizing I have issues reading problems correctly considering I completely missed the whole "positive" word in the question! Thanks for your time.

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Re: Number Properties - consecutive integers   [#permalink] 18 Jun 2008, 18:16
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x and y are consecutive positive integers and: x>y,

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