Bingo Cards
The most common Bingo cards are flat pieces of cardboard or disposable paper which contain 25 squares arranged in five vertical columns and five horizontal rows. Each space in the grid contains a number.
A typical Bingo game utilizes the numbers 1 through 75. The five columns of the card are labeled 'B', 'I', 'N', 'G', and 'O' from left to right. The center space is usually marked "Free" or "Free Space", and is considered automatically filled. The range of printed numbers that can appear on the card is normally restricted by column, with the 'B' column only containing numbers between 1 and 15 inclusive, the 'I' column containing only 16 through 30, 'N' containing 31 through 45, 'G' containing 46 through 60, and 'O' containing 61 through 75.
The number of all possible Bingo cards with these standard features is P(15,5) × P(15,5) × P(15,4) × P(15,5) × P(15,5) = 552,446,474,061,128,648,601,600,000 or approximately 5.52×1026.
In U-Pick'Em bingo and other variants of bingo, players are issued three 25 number cards which contain all 75 numbers that may be drawn. Players then mark which numbers they wish to play and then daub those numbers according to the numbers drawn. In addition, double-action cards have two numbers in each square.
The most chips one can place on a Bingo board without having a Bingo is 19, not counting the free space. In order for this to happen, only one empty cell can reside in each row and each column, and at least one empty cell must be in each diagonal, for instance:
B I N G O
● ● ● ●
● ● ● ●
● ● □ ●
● ● ● ●
● ● ● ●
In addition to a straight line, many bingo halls may consider other patterns as a valid bingo, usually in special games. For example, in the illustration above, the 2x2 square of marked squares in the upper right-hand corner would be considered a "postage stamp". Another common special game requires players to cover the four corners.
Read more about this topic: Bingo (U.S.)
Famous quotes containing the word cards:
“Out in Hollywood, where the streets are paved with Goldwyn, the word “sophisticate” means, very simply, “obscene.” A sophisticated story is a dirty story. Some of that meaning was wafted eastward and got itself mixed up into the present definition. So that a “sophisticate” means: one who dwells in a tower made of a DuPont substitute for ivory and holds a glass of flat champagne in one hand and an album of dirty post cards in the other.”
—Dorothy Parker (1893–1967)