How many meanings can you think of for the letter X? There are at least twelve.

(Possible) Answers:

Crossing (RRX)
Kiss (XOXO)
Movie rating
Signature indicator ("Sign here")
Tic-Tac-Toe mark
Multiplication sign (Times)
Strike in bowling
Ten in Roman numerals
Location indicator on a map ("You are here")
"The spot" - Buried treasure indicator
Symbolic unknown in algebra
Signature for one who can't write