The answer will depend on the size of the tiles.
If it is a 4inch by 4inch (1/3foot by 1/3foot)tile and it covers a 10ft by 10ft area then it will take 900 of these tiles to cover the whole floor. If you walk ten feet on a edge of this floor then you will have to place 30 tiles along this edge. Since the area is a square area then to find the amount of tiles just multiply 30 by 30 to get 900tiles.
It would help to know the size of the tiles!
You can't answer how many tile you need since the size of the tile wasn't provided in the question. You will need 100 square feet of tile to cover the area and 10 square feet extra for cuts, breaks, and mistakes. Buy 110 square feet of tile.
You will need 140 tiles (10 x 14 = 140)
That is 90 square feet and that should require 90 12in tiles.
100 As 12 inch = 1 foot 10 x 10 = 100 100 / 1 = 100
10ft X 10ft = 100sq ft /9 = 11.11 sq yds
In the US, a bundle of Shingles is equal to "One Square". A Square is an area of 10ft. by 10ft.