100: (20 x 20)/(2 x 2)
5,184 2-square-inch tiles are needed.
236 18-inch tiles.
297 16x16-inch tiles.
18 10x10-inch tiles.
125 16-inch tiles.
113 tiles
90 tiles.
55 tiles
1296 Tiles
440 6-inch square tiles.
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.
You will need at least 67 tiles. This will cover 150.75 square feet.