400. That's because there are four six-by-six tiles in each square foot. 4 tiles per square foot X 100 square feet = 400 tiles.
Two tiles of 16 ft*16 ft will cover 512 square feet.
397
240
4*11=44 44 tiles
192 tiles
Each 16 inch tile is 1.78 square feet. You would need 169 tiles, plus some for spoilage.
864 tiles.144 tiles per square foot.
500/1.78 = 281 tiles
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
76.6 tiles
256 tiles
67 tiles.