Question

Andy has 9math books and 6reading books if he want to distribute them evenly among some bookshelf's so that each has the same combination of books with none left over what is the greatest number of bookshelves Andy can use

Answer 1

3 bookshelves.

Explanation:

That would be 3 maths books and 3 reading books on 3 shelves.

Answer 2

He would need 3 book shelves. They both have a common multiple of 3. 6/3 = 2 so there will be 2 reading books per shelf. 9/3 = 3 so there will be 3 math books per shelf