The area of a rectangular garden is 7722 m“.
If the length of the garden is 99 m, what is its width?

The width of the garden is 78
You just divide 7722 by 99 (which is 78)

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.