42
15
180
abswer is 6.9218 square feet
10
15 exactly !
As 8 feet x 8 feet = 64 square feet it will only take one 8 feet by 8 feet tile to cover 64 square feet.
Thirteen
192 tiles
16x16 square feet = 256 square feet, so two tiles will suffice.
A 2ft x 2ft square is 4 square feet and 42 squares will be needed to cover 168 square feet.
900 of them.