Can anyone figure this one out?

[donzi5150]

http://www.learnenglish.org.uk/games...er-central.swf :rollside:

[voodoomedman]

It's mathematical. There can only be so many different possible answers. All of the possible answers have the same symbol. Every time you play the mix up the symbols but still the possible answers have all the same symbols. Try picking the same number twice and it will have a different symbol.