A 120 m square shaped floor is to be covered with square tiles of side 4 m. One 1 tile cost $4.25 at Drakes Traders Ltd. How many tiles are needed to cover the floor?

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.