In the water, the bottom of a boat is 2.1 feet below the surface and the top of the boat is 8.7 feet above it. towed on a trailer, the bottom of the boat is 1.3 feet above the ground. can the boat and trailer pass under the bridge?

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.