Carlos is arranging books on shelves. He has 24 novels and 16 autobiographies. Each shelf will have the same numbers of novels and autobiographies. If Carlos must place all the books on shelves, what are the possible numbers of shelves Carlos will use?
If Carlos must place all the books on shelves, he may possibly use 10 shelves if he is to place 4 books per shelf, or 5 shelves if he is to place 8 books on each.
