Two cars leave South Hill Mall at the same time driving in opposite directions. One car is driving 55 miles per hour while the other car is driving 65 miles per
hour. When will the cars be 1020 miles apart?

Cbottom left is the correct one.

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.