Multiply the number by successive counting numbers.
There are an infinite number of multiples of 9
Maybe that the factors of the number are also factors of the number's multiples?
Divide a number by 11. If the quotient is a whole number, it's a multiple.
Common Multiples.
common multiples
common multiples
Multiples. Numbers have an infinite number of multiples.
Common multiples
common multiples
common multiples
common multiples
Common multiples.