A rectangular rug has a central rectangular area in a gray geometric pattern surrounded (on all four sides) by a red uniform border of equal width. The central geometric pattern is 4 metres by 6 metres.
The total area of the rug, including the gray area plus the red border, is 80 m². Find the width of the red
border.

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.