Classic 1–75 number bingo cards
The standard US 75-ball layout: B is 1–15, I is 16–30, N is 31–45, G is 46–60 and O is 61–75, with a free centre square. The PDF ends with a caller sheet so you can tick off numbers as you draw them.
How to call 75-ball bingo
Write 1–75 on slips of paper (or use the caller sheet with a random number app). Call the column letter with the number, like "N 42", and tick it on the caller sheet so you can check winning cards.