You will need 233 30x30cm tiles to cover the room.
144 tiles
375
154
122
Area = L x W : 14X16 = 224 SF. Typically you would add 7-10% for breakage & cuts, sometimes adding more depending on the material being used and the pattern being installed. A pattern requiring many cuts (i.e. diagonal, staggered, hopscotch) you may want to add 10-12%, more if natural stone. Also, use Square Footage to purchase materials, not the amount of tiles. Why? A 12X12 is not necessarily a 12X12; some are bigger, some are smaller. Some sizes can get confusing with overseas manufacturing. European tiles are typically Metric, so a 30X30 may really be 30X30 cm, but that's a little smaller than 12X12 in standard measurements.
210 tiles
Just about 26.
The answer will depend on the size of the tiles!
123 tiles
16 square tiles
You would need a total of 36 tiles to cover that area.
It obviously depends on the size of the rooms.
That would depend on the size of the tiles.
13 boxes with 13 tiles in each
I assume you mean an 8ft x 6ft room, which is 48ft2. I assume you mean 12in x 12in tiles, which are 1ft2 tiles. I don't know how many tiles are in a box, but you would need 48 12in x 12in tiles.
forty
24 of them.