If one ray, contains another ray does that mean they are the same?

the rays are considered the same if each ray contains the other. If only one of the rays contains the other, it's not enough.

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.