If you mean 12x12 "inches", then each tile covers 1 square foot. We trust you can take it from there.
4.
256 tiles
The tile is bigger than the area that you want to cover (12x12 > 10x11) so one tile will do. <><><><><> However, if you meant 12x12 INCH tiles, and a 10x11 FOOT room, you would need 110 tiles.
1 and 1/3 tiles of 9 x 12 tiles will equal 1 square feet. Therefore, it will take 25 times 1-1/3 tiles or approx. 34 9x12 tiles to tile a 25 square foot area.
If 12x12 is 144... There would be 144 tiles in a box right?
144 tiles
If you mean 12x12 "inches", then each tile covers 1 square foot. We trust you can take it from there.
4.
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
238
122
154
256 tiles
36 tiles. I would hire a tiler if I was you, this doesn't sound like your 'thing'
The tile is bigger than the area that you want to cover (12x12 > 10x11) so one tile will do. <><><><><> However, if you meant 12x12 INCH tiles, and a 10x11 FOOT room, you would need 110 tiles.