La receta de bolas de arroz de Justin utiliza 100 gramos de arroz para hacer 1 bola. Justin tiene 700 gramos de arroz. ¿Cuántas bolas de arroz puede hac er Justin con 700 gramos de arroz? bolas de arroz.

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.