Meg is dyeing a shirt in her washing machine. The washing machine holds up to 30 gallons. Meg pours 3 quarts of dye mixture into the washing
machine and fills the remaining part of the 30 gallons with water.
How many quarts of water does Meg add to the washing machine?

You didn’t put the necessary image to solve the question : p

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.