Trains, Politics, Music and Religion (?)
Illegitimi non carborundum
I tried it twice and couldn't figure it out either. And, I linked to it so lets see what my readers think.
Hey, one of my readers sent me the answer. Take a look at my blog. Of course I don't know enough html to make it link.
It's nine. Or a multiple of nine. And all multiples of nine have the same sign. The sign is different each time that you try the game but all the multiples of nine are the same sign.
Always glad to have some form of reaction/response to my posts. Caustic or otherwise.