19 1/2 tiles plus you want to add 10% for waste
46 bricks; add a few more for waste and cutting
Is that 144 square feet, as in 12' x 12'?If that is the case, you would need a minimum of 81 bricks. If the patio is indeed square, or 12' by 12', each side is 144", or 9 16" bricks. 9 x 9 = 81 bricks.If the patio is not square, you may need extra bricks on one or both sides if the width is not evenly divisible by 16 inches.
If the bricks are in feet then 51/2 bricks would be needed.
78.47 Pavers
The answer will depend on the size of the bricks!
between 1100 and 1200 bricks
The answer will depend on the shape of the patio. If it curved then some bricks will need trimming and that will result in wastage and so a larger number of bricks will be required. Also, if the patio leaves a small fractional amount after a whole number of bricks, you will need a lot more bricks. As an extreme example, if the patio is 8 cm*625 metres then you will need 3125 bricks. However, if the shape is convenient, you will require 2500 bricks.
488 bricks.
450 bricks
you would need 12...
About 14 bricks should do it.
That depends on your materials. Bricks and blocks tend to be rectangles. Concrete can be any shape you would like.