Answer:
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
I invade your home once a yearโฆbut only if youโve been good.
If two's company and three's a crowd what are four and five?
My days are numbered.
What language does a billboard speak?