You would need 252 tile with a small waste factor.
The general rule is 10% for waste - 280 sq ft would give you more then enough.
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.
You will need 140 tiles (10 x 14 = 140)
Depends how big the tiles are!
Assuming none are broken during the installation process, 64 full tiles will be required.
144
There are 12in in a foot, therefore the tiles are 1 squared foot each. So you should ideally need 84 tiles
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.
You will need 140 tiles (10 x 14 = 140)
17*12 = 204 tiles.
Depends how big the tiles are!
240 square tiles are needed
Assuming it's a 4x4 wall, 64 tiles
You would need 216 tiles if you left no space between them for grout.
6
Assuming none are broken during the installation process, 64 full tiles will be required.
18..
180