[lorinda]

Bingo has a 90 number board.
Each player is given a card with 15 numbers on it.
New numbers are drawn at random from 1-90 (with no replacement, so the longest possible is 90 draws) until a player has ticked off all their numbers, the first player to do so is the winner.
all I know is that 48 is hard.
A room with 200 or so people tends to get a winner at somewhere around 52-55 I believe (totally from old memories)