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# If x, y, and a are integers, is x>y? 1). x+a > x-a 2).

Author Message
Director
Joined: 17 Oct 2005
Posts: 924

Kudos [?]: 267 [0], given: 0

If x, y, and a are integers, is x>y? 1). x+a > x-a 2). [#permalink]

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22 Feb 2006, 03:53
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x, y, and a are integers, is x>y?
1). x+a > x-a
2). ax>ay

Kudos [?]: 267 [0], given: 0

Director
Joined: 17 Dec 2005
Posts: 544

Kudos [?]: 40 [0], given: 0

Location: Germany

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22 Feb 2006, 04:19
1)

a>1/2
insufficient

2)

ax>ay, a could be positive or negative

1+2) sufficient

C

Kudos [?]: 40 [0], given: 0

Director
Joined: 17 Oct 2005
Posts: 924

Kudos [?]: 267 [0], given: 0

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22 Feb 2006, 17:42
1)

a>1/2
insufficient

2)

ax>ay, a could be positive or negative

1+2) sufficient

C

oa is C

doesnt I. simplify to 2a>0-----> a>0 ?

Kudos [?]: 267 [0], given: 0

Manager
Joined: 20 Feb 2006
Posts: 214

Kudos [?]: 17 [0], given: 0

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22 Feb 2006, 21:48
From (1), we can deduce that a > 0 (a > 1/2 is a mistake)

Kudos [?]: 17 [0], given: 0

22 Feb 2006, 21:48
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