En un triángulo acutángulo las longitudes de dos de sus
lados suman 30. Calcule el mayor valor entero que
puede tomar la altura relativa al tercer lado.

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.

2/1 or just 2. sorry if i get this wrong