Assume that the tiles are 3 inches by 6 inches, although there is no reason to do that!
Area of each tile = 0.25 ft * 0.5 feet = 0.125 sq feet.
Number of tiles required = Total area to be covered/Area of each tile
= 210/0.125 = 1680 tiles.
That is the mathematical answer. In real life, the number required will depend on the configuration of the area to be tiled. For example, a circular area of 210 square feet will require far more tile cutting than a rectangular one - even fewer if both sides of the rectangle are in quarter of half feet. That then brings into play your tiling skills, wastage etc.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
How many 24x24 tiles it take to cover a 14×14 room
You will need at least 67 tiles. This will cover 150.75 square feet.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
67 tiles.
76.6 tiles
190
Two tiles will suffice since they will cover 36 square feet.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
500/1.78 = 281 tiles
start with 38 tiles.
How many 24x24 tiles it take to cover a 14×14 room
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
You will need at least 67 tiles. This will cover 150.75 square feet.