The height of a rock climbing wall is 137 feet. How many feet has Sara climbed when she is 48 from the top of the wall?

What the proper work

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.