16 x 16 inch tiles are actually (1 and 1/3) x (1 and 1/3) feet tiles which turns out to have an area of (4/3) x (4/3) = 16/9 square feet. So you want to cover 80 square feet. The number of tiles required is (80) / (16/9) = (80) x (9/16) = 45 tiles
5,184 2-square-inch tiles are needed.
128.2 tiles
400 6" x 6" tiles are needed.
54
247.1
236 18-inch tiles.
5,184 2-square-inch tiles are needed.
128.2 tiles
400 6" x 6" tiles are needed.
22.2 tiles so buy 23 tiles.
It would be 9 tiles wide by 12 tiles long. That gives you a total of 108 tiles.
35
54
247.1
You will need 44 six inch tiles to cover 11 square feet.
I hope you meant 20 inch by 20 inch tiles, but the answer is around 13.38
720 4"x 8" tiles are needed.