You would need 216 tiles if you left no space between them for grout.
Assuming the tiles are 1 foot squares, you would need 10*15 = 150 tiles.
Depends how big the tiles are!
You will need 140 tiles (10 x 14 = 140)
17*12 = 204 tiles.
Assuming it's a 4x4 wall, 64 tiles
240 square tiles are needed
6
144
18..
Assuming none are broken during the installation process, 64 full tiles will be required.
18*18 = 324 tiles.
41