In math terms, a number's multiples are the product of that number and another whole number. For instance, multiples of seven include seven, 14 and 21 because these numbers result when seven is multiplied by 1, 2 and 3.
All multiples of 10 end in a zero because 10 multiplied by any number has a zero at the end. All multiples of five end in five or zero, and all multiples of two end in an even number. Every number is a multiple of one, and the least common multiple of two numbers is the smallest number evenly divisible by both of the numbers.