The document discusses multiples and factors. It defines multiples as the products when a number is multiplied by 1, 2, 3, and so on. The multiples of a number can be divided by that number with no remainder. It then lists the first 12 multiples of 3 as 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36. The document also discusses common multiples, which are numbers that are multiples of all numbers given, such as the common multiples of 2 and 3 being 6, 12, and 24.