12inch x 12inch is 1ft x 1 ft=1 square foot
You need 100 patio stones
152.54
Gee, a square foot is 12x12, difficult problem.
272 Get 300 to be safe.
54
Assuming the 12x12 bricks are 12 feet on each side, those are 144 square feet. The patio itself is 76 square feet. Unless you made a typo, not even one of those bricks is going to fit on the patio; you end up with about 0.5278 bricks.
576 should do it.
152.54
Gee, a square foot is 12x12, difficult problem.
92 should do it.
72
272 Get 300 to be safe.
54
Assuming the 12x12 bricks are 12 feet on each side, those are 144 square feet. The patio itself is 76 square feet. Unless you made a typo, not even one of those bricks is going to fit on the patio; you end up with about 0.5278 bricks.
36 tiles. I would hire a tiler if I was you, this doesn't sound like your 'thing'
12" x 12" = 1 square foot, so you need 452 of them.
256
40, if it's exactly 5x8 and there's no cutting involved. So get at least 48.