Two tiles of 16 ft*16 ft will cover 512 square feet.
If you mean 16 ft x 16 ft then 2 tiles will suffice. If you did not mean 16 ft x 16 ft you could have considered mentioning what units of measurement you meant.
16 in = 1.33... ft So 16 x 16 = 1.77... sq ft To cover 247 sq ft, you would need 138.94 ie 139 tiles - assuming no wastage.
12 in = 1 ft → 1 tile = 16 in × 16 in = (16 ÷ 12) ft × (16 ÷ 12) ft = 16/9 sq ft → 80 tiles = 80 × 16/9 sq ft = 1280/9 sq ft = 142 2/9 sq ft ≈ 142.22 sq ft
One tile of 16 ft x 16 ft will be more than big enough!
One tile measuring 16 ft x 16 ft will be more than big enough.
16" * 16" = 1.77777 square feet, so , 80 / 1.77777 = 45 tiles
65 1/2 pieces
300 sq ft X 144 sq in/sq ft = 43200 sq in 43200 sq in /(16 in X 16 in) = 169 tiles That is true if the tiles fit exactly. If you have to cut some tiles because the length or width of the floor is not an exact multiple of 16 inches, then you may need more.
21 (20.25)
It depends on the size of the tile. The number of 16cm x 16 cm tiles required will be quite different from the number of 16 inch x 16 inch tiles. Unfortunately, you do not specify which. And, if the tile was 16 ft x 16 ft, then 1 tile would be sufficient!
Just the 1, as 1 tile is 16 x 16 = 256