Question

A square is 10.5 sq ft by 10.5 sq. ft. The tiles used are 1 sq. ft. How many tiles will be used to fill the space?

Answer 1

For 10x10 = 100 tiles

Now the question remains about the other half-foot. You will need another 20 tiles split in half to get the half-foot done. For the corners, you will need 4 1/2 sq. ft. tiles from one tile.

So, without errors in cutting, I would say 121 tiles.