Are you good with riddles?

Are you good with riddles?

Posers and Puzzles

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wgp

Joined
10 Mar 06
Moves
8351
14 Nov 06

give me a x (as in times sign) and i'll stand and face you
give me a + and i'll turn away from you
what am i?

hint:
russell crowe is obsessed w/ this in a beautiful mind.

k

Joined
24 Nov 05
Moves
1113
15 Nov 06

a negative?

BQ

Joined
15 Sep 06
Moves
1692
19 Nov 06

A negative number?
Example.
-2x2=-4 so it turns to face the negatives, but if
-2=2=0 so it turns away from negatives.