Considered by many to be among the easiest to play of all table games, bingo involves the use of a specially-designed card that contains a set of uniquely-combined numbers placed within a grid or square. In the US, bingo makes use of numbers 1 to 75 in contrast to UK-based bingo games where the bigger 90-ball bingos are used.
The mechanics of a bingo game US style often involves the completion of a pattern on the bingo card as required by the game masters just before the start of every bingo game. The pattern required to be completed usually varies and this can range from a single straight line to the more popular but complicated one where every number found on the bingo card needs to be marked off.
In any case, once a bingo player gets to purchase his bingo card, he is expected to wait for the pattern that he is supposed to form on his card based on the requirement of the bingo game that he will be playing in. This is usually announced by the official game master, commonly referred to as the game caller or caller for short.
The bingo cards have traditionally been made of cardboard pieces or some other recycled materials measuring approximately five by five. They contain 25 equally-measured squares arranged into ten rows, five horizontal and five vertical. Each square carries one number, the smallest being 1 and the highest being 75, with the central square usually offered as a bonus and thus carries no number.
The word BINGO can clearly be seen spelled atop each of the five different vertical columns of every card, with each letter carrying 15 different numbers. The arrangement usually goes as follows: numbers 1-15 fall under the column of B; column I carries numbers 16-30; numbers 31-45 fall under N; G has numbers 46-60; and O carries numbers 61-75.