225
The patio is 10x 12 = 120 sq ft or 17,280 sq in The pavers are 16x16 = 256 sq in So you need 17280/256 = 68 pavers
16"=1.33" 1.33 x 1.33 = 1.7689 sq ft 224 / 1.7689 = 126.63 pavers
144.63 pavers
8 feet x 8 feet = 96 inches x 96 inches and divide this by 16 x 16 to get (96 x 96)/(16 x 16) = 6 x 6 = 36
You would need approximately 104 pavers to cover 250 square feet with 16 x 16 pavers, assuming no cuts or wastage. This calculation accounts for the fact that each paver covers 1.78 square feet (16 x 16 = 256 square inches, which is equivalent to 1.78 square feet).
225
The patio is 10x 12 = 120 sq ft or 17,280 sq in The pavers are 16x16 = 256 sq in So you need 17280/256 = 68 pavers
16"=1.33" 1.33 x 1.33 = 1.7689 sq ft 224 / 1.7689 = 126.63 pavers
225
144.63 pavers
8 feet x 8 feet = 96 inches x 96 inches and divide this by 16 x 16 to get (96 x 96)/(16 x 16) = 6 x 6 = 36
90 pavers. First, convert 16 inches (the length of the side) into feet so that you can work with all of the numbers in the same way. 16 inches/12 inches per foot = 1.333 feet. Then, square the length of the side to get the area of one paver. 1.332 = 1.777... Then, divide the total area (160 square feet) by the area of one paver (1.777 square feet) to get the total number of pavers. This is 90 pavers.
90. Get 100 to be safe.
I have to assume several things. First that you mean 12 feet by 12 feet. Second that you mean 16 inches by 20 inches. Third that there is no spacing between the pavers (this last assumption is not a good ond, usually there are spaces). 12 feet x 12 = 144 inches ---- 144 in / 16 in = 9 pavers long ---- 144 in / 20 in = 7.2 pavers wide so there must be spacing use 7 pavers 7x9 = 63 total pavers. OR YOU CAN ALTERNATE THE PAVERS TO FORM A PATTERN. Use the 16 for length beside one turned to get 20 length beside it. This yields 36 inches. Play with the pattern on paper until you get one that you like.
ANSWER 16 x 16 inch = 1.78 sq.feet 120 / 1.78 = 67.42 so you need to have 68 pavers The plot is 144 inches wide. 144/16=9 pavers wide. The short dimension is 120 inches which would require 8 pavers with the final row of pavers cut to fit. Thus in a 9 X 8 paver grid you'd need 68 pavers, but 4 of those pavers would have to be cut in half for the final row.
convert inches to feet. 16"/12"=1.33 ft find area of paver. 1.33 ft x 1.33 ft =1.77 sq ft /paver divide areas. 90 sq. ft./1.77= about 51 pavers