Bingo is a game that is relatively simple to learn and understand, regardless of the variant employed. The game is played using boards (or cards) with a selection of random numbers on them. Those who play then mark off the numbers that are drawn, and if somebody successfully lines up the numbers on their board then they win. The number of balls depend on the variant, with some having less numbers and some having more, such as the British version having 90 balls opposed to the American version having 75. Each game usually lasts for a set amount of time with player vying to see who can mark off all the required numbers before anyone else.