It depends on the dimension used for measuring the tiles. Whether they are 12 in x 12 in or 12 cm x 12 cm will make a huge difference to the number of tiles required!
If the tiles are 12x12 inches square - you would need... 75 !
549!
0 if the tiles are truly 12 feet by 12 feet
12" x 12" = 1 square foot To cover 500 square feet requires 500 of them, plus some extra in case you crack or chip a few.
One 12' x 12' cover will cover 144 square feet, so just one but you might have to cut it.
1540
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
If the tiles are 12 inches square... 8352 tiles ! However if they're 12 feet square... 58 tiles
190
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
120
14
68
195 12 inches x 12 inches is 1 square foot
375
120
650