Oxford City Printers needs to ship 2,100 graduation programs to a university. The printing company can fit 700 programs in each box. How many boxes will the printing company need to use?

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.

Ireally don’t understand your problem do you have a better picture of it