Bingo card cards to overcome the difficulty with randomization. There are two types of Bingo cards. One is a 5x5 grid meant for 75-ball Bingo, which is largely played in the U.S. The other uses a 9x3 grid for U.K. style "Housie" or 90-ball Bingo. Players use cards that feature five columns of five squares each, with every square containing a number (except the middle square, which is designated a "FREE" space). The columns are labeled "B" (numbers 1–15), "I" (numbers 16–30), "N" (numbers 31–45), "G" (numbers 46–60), and "O" (numbers 61–75). A popular Bingo myth claims that U.S. Bingo innovator Edwin
National Bingo Game be over 18 as an underage player would, by law and under the rules of the game, be ineligible to participate or claim any prize. Until 1994, the National Bingo Game was the UK's largest computer controlled game until the National Lottery was launched. The lottery did have a negative impact on attendances at bingo clubs, although the game underwent several changes in attempt to boost prize money and compete with the lottery. Over £1 Billion has been paid out in prize money since the National Bingo Game was launched. In September 2007, bingo operators were allowed to introduce rollover