67 tiles.
100 tiles or 96 which is the correct amount
288
266.666666666 so rounding up 267 tiles.
You'll need 200 18-inch tiles.
67 tiles.
start with 38 tiles.
220
The answer depends on the measurement units used for 18x18.
22.2 tiles so buy 23 tiles.
192 tiles
100 tiles or 96 which is the correct amount
118
288
You'll need 200 18-inch tiles.
266.666666666 so rounding up 267 tiles.
10