64
2.77 square feet.
1.7689
There are 144 18 square inch tiles in an area of 18 square feet.
13.292 square feet.
1.78 square feet.
I think perhaps 2250 blocks .
810
Assuming they are 8 inch*16 inch blocks, 144 square feet = 144*12*12 square inches. So number of blocks required = 144*12*12/(8*16) = 162
720 4"x 8" tiles are needed.
2.78 square feet.
2.77 square feet.
12 x 12 blocks (assumed as 12 inch x 12 inch) That means the blocks are 1 square foot each Hence to cover 240 square feet area, you would need 240 blocks
2.25 square feet.
More information is needed EG what type of 12 inch blocks there are many(see link below). Also what way up are you using these blocks. http://www.boralbestblock.com/product-lines/masonry/standard-block/12-inch-block
1.7689
64 of them.
40 square feet.