What is the common multiple of 15 30 and 45?
There are infinite common multiples for a set of numbers. So it
is not possible to write down all the common multiples.
Some common multiples of 15, 30 and 45 are 90, 180, 270,
360,...
There is another way to find common multiples: Write the
multiples of LCM(15, 30, 45).
Actually the common multiples of a set of numbers are the
multiples of their LCM.
LCM of 15, 30 and 45 is 90.
And the multiples of 90 are 90, 180, 270, 360, 450, 540,...
which are the common multiples of 15, 30 and 45.