144 Get 160 to be safe.
72 Get 80 to be safe.
78.47 Pavers
297 16x16-inch tiles.
144.63 pavers
You would need 81 16x16 pavers to cover a 36 square foot area. Each 16x16 paver covers an area of 1.78 square feet, so dividing 36 by 1.78 gives you 20.22 pavers. Since you can't have a fraction of a paver, you would round up to the nearest whole number, which is 81.
144 Get 160 to be safe.
72 Get 80 to be safe.
It depends on the units used to measure the pavers: inches, centimetres, cubits, etc. It is not possible to answer the question without that information.
78.47 Pavers
111 if you can cut 10 exactly in half to make 20 half pavers
297 16x16-inch tiles.
You would need 320 pavers to cover 160 square feet with 6x9 pavers, assuming each paver covers 0.5 square feet.
16x16 square feet = 256 square feet, so two tiles will suffice.
The answer depends on the measurement units used for 16x16. The answer also depends on the shape of the 390 sq ft area to be covered because the more irregular the shape, the greater the number of pavers you will need to cut. That is likely to result in some breakage. Furthermore, you may not want to use all the offcuts since that will make part of the area into a mosaic.
144.63 pavers
Any reason why it shouldn't be 220, apart from the shape of the area?