A 16 X 16 inch tile encompasses 256 inches (16 multiplied by 16). A square foot = 12 inches X 12 inches. So 350 square feet would be 350 multiplied by 12 multiplied by 12 = 50,400 inches. So 50,400 inches (350 square feet) divided by 256 inches (16 X 16 inch tile) = 196.875 which would mean you would need approximately 197 tiles. This is only the math portion of your question, however you may need more than that to account for errors and tile cuts to fit the dimensions of your room.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
If the tiles are 1 foot squares, it will take 1,650 of them to cover 1,650 square feet. If the tiles are 16 inch square (1-1/3 square feet, each), then it would take 1,238 tiles.
I'm going to assume that the tiles are square inches, rather than square feet. But they can be converted to 3 square feet, which means 70 of them would cover the space if it were perfectly rectangular. Get 80 to be safe.
You will need at least 66,828 1/4 tiles to cover that area.
76.6 tiles
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
500/1.78 = 281 tiles
If the tiles are 1 foot squares, it will take 1,650 of them to cover 1,650 square feet. If the tiles are 16 inch square (1-1/3 square feet, each), then it would take 1,238 tiles.
If that is 2' x 4' it would cover 800 square feet. If it is 2" x 4" it would cover about 5.5 square feet.
.375
192 tiles
Approximately 73 square feet.
I'm going to assume that the tiles are square inches, rather than square feet. But they can be converted to 3 square feet, which means 70 of them would cover the space if it were perfectly rectangular. Get 80 to be safe.
Two tiles will suffice since they will cover 36 square feet.
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
11 feet x 14 feet = 154 square feet. You would need 9 tiles, that measured 4 inches x four inches, to cover one square foot. So you would need 154 x 9 tiles to cover the entire area, which is 1386 tiles.
Assuming that 12 x 12 is 12" x 12" (one square foot), then 30 one-square-foot tiles would cover 30 square feet.