Samantha has 45books. she can pack 7 books in box how many boxes can she completely fill how books will be let

In this question, two things have been asked, but the funny thing is that the answer to both the questions can be reached following a single procedure. The information's that have already been provided in the question are:
Number of books Samantha has = 45
Number of books that can be packed in a box = 7
Number of boxes that can be packed with 7 books can be found by dividing the total number of books by the number of books in a box. also the remainder that will be left is actually the number of books that were left after packing the boxes.
Then
Number of boxes containing 7 books each = 45/7
                                                                     = 6 3/7
So 6 boxes can be packed with 7 books each and 3 books will be left behind.

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.