Paul is spreading grass seed on an area of his lawn that is 10 feet wide and 12 feet long. A bag of seed covers 15 square feet. How many bags of seed will Paul need to cover the area?

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.