Bingo Cards
What is a bingo card you may ask yourself, you must have heard about it somewhere or else you would not be reading this now. It is used when playing bingo, online or when you play at any traditional bingo gathering. It is used to fill in the numbers that are being called out by the caller and this card is probably the most important element of Bingo.
How it works:

The bingo card has the letters B, I, N, G, O at the top and spells bingo and on it you have numbers and these are the numbers that the caller is going to call out and at the centre there is a free block which can be any number. Now as the caller calls out a number and you have the number he is calling on your card you cross it out on the card. Now if you can spell the word bingo from left to right or from corner to corner with the numbers that you crossed out before anyone else you win and therefore win the prize. Quite simple, but rather fun!

ONLINE BINGO CARDS
Online bingo cards are displayed on the screen and it works the same way as in real bingo. Only now you can play many different bingo games at the same time, which makes it far more exciting. The computer also chooses the cards for you and you pay for them just like when playing it in real life.

When bingo started there were only twenty four unique cards. When bingo was introduced in the United Stated the man who started it Edwin S. Lowe he hired a mathematician to create more unique cards and after a while the mathematician created more than six thousand unique cards.

Now with the power of the computer there are many unique bingo cards, so many more people can play bingo at the same time now and it has become much more fun and challenging.

In the USA each card consists of a grid of five columns and five rows with twenty four numbers out of a total of seventy five. In the UK and in Australia the cards consist of nine columns and three rows with fifteen numbers out of a possible ninety. In the first column 1-9 is listed and in the second 10-19 and so on the make it easier for the players to find the number that is being called out by the caller.

BINGO CARDS
Patterns:
Bingo games are played in many patterns, the most common is a straight line in any direction, vertical, horizontal or diagonal. Other patterns also exist including the four corners and shapes like the letter T and so on. A coverall game is when players win when all the numbers are crossed out in the pattern the caller announced before the game started.

BINGO CARDS
Card variations:
Canadian and American bingo cards are 5 × 5 grids of numbers only; dual daub, dual dab, or "double-action" cards have two numbers in each square. Each space in the grid contains a number, except for the centre square, which is considered filled. The highest number used is 75. The columns are headed with the letters of the word BINGO, and the letter is called with the number — for example, B-10, I-25, N-40, G-55, O-70. Numbers 1 to 15 are assigned to the B column, 16 to 30 to the I column, 31 to 45 to the N column, 46 to 60 to the G column, and 61 to 75 to the O column.

In the United Kingdom and Australia bingo cards have three rows and nine columns. Five squares in each row contain numbers ranging from 1 to 90 and the rest are blank. The numbers are usually called quickly, so players rarely play more than one book (six cards). A bingo book (a set of six cards) contains all the numbers from 1 to 90, fifteen numbers on each card, five numbers in each row. The first column contains single numbers, the second tens, the third twenties, and so on. Number 90 is placed in the ninth column along with the eighties.
Each card has a unique serial number to permit quick verification by computer.