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

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Director
Joined: 17 Oct 2005
Posts: 938
Followers: 1

Kudos [?]: 68 [0], given: 0

If x, y, and a are integers, is x>y? 1). x+a > x-a 2). [#permalink]  22 Feb 2006, 02:53
If x, y, and a are integers, is x>y?
1). x+a > x-a
2). ax>ay
Director
Joined: 17 Dec 2005
Posts: 548
Location: Germany
Followers: 1

Kudos [?]: 15 [0], given: 0

[#permalink]  22 Feb 2006, 03:19
1)

a>1/2
insufficient

2)

ax>ay, a could be positive or negative

1+2) sufficient

C
Director
Joined: 17 Oct 2005
Posts: 938
Followers: 1

Kudos [?]: 68 [0], given: 0

[#permalink]  22 Feb 2006, 16:42
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 ?
Manager
Joined: 20 Feb 2006
Posts: 213
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  22 Feb 2006, 20:48
From (1), we can deduce that a > 0 (a > 1/2 is a mistake)
[#permalink] 22 Feb 2006, 20:48
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# If x, y, and a are integers, is x>y? 1). x+a > x-a 2).

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