There are 6 possible ways to get bingos on a bingo card: vertical, horizontal, diagonal, 4 corners, daubing an instant win and the "Blackout".

You can get the first 4 bingos with any line (vertical, horizontal, diagonal, and 4 corners).

You can only get the 5th bingo by playing an Instant Win power up and daubing it.

You can only get the 6th bingo by daubing every single number on the card.