Bingo card generator

A number card is not 24 numbers picked at random from 1 to 75, which is what most generators produce. In real 75-ball bingo each column draws from its own range: B from 1–15, I from 16–30, N from 31–45, G from 46–60 and O from 61–75. That is what makes a called number findable — you look in one column, not across the whole card. A card generated without the column ranges looks right and plays wrong, and anyone who has played will notice within a few calls.

Word cards need at least 24 different entries for a 5×5 card with a free centre, or 25 without it. Duplicates in your list are counted once, because two identical squares on a bingo card create an ambiguity about which one to mark — so a list of thirty entries with six repeats is a list of twenty-four, and the tool says so rather than filling the card with duplicates.

Every card in the batch is generated independently, so cards genuinely differ. That matters for the obvious reason: identical cards mean everyone wins at once. With 24 squares drawn from five pools of 15 the number of possible cards is astronomically large, so a collision in a print run of fifty is not something to worry about.