Multiples of 105 include 105, 210, 315 and so on. For them to be common, they need to be compared to another set of multiples.
A simple answer is 1 and 105.
There are infinitely many common multiples of 3, 5 and 7, each one 105 larger than the previous one. Or to put it another way: the common multiples of 3, 5 and 7 are the multiples of their lowest common multiple which is 105. ie their common multiples are all the multiples of 105, of which there is no end - there is an infinite number of multiples of 105 (or any other number [except zero]).
Since all 3 are prime numbers LCM = 3 * 5 * 7 = 105 All multiples of 105 are multiples of 3, 5 and 7
105 is the lowest, following this, multiples of 105
105
The first 5 multiples of 21 are: 21, 42, 63, 84, and 105.
You need at least two numbers to find an LCM and there can only be one least common. If you want to know multiples of 105, just keep adding 105. 105, 210, 315 and so on.
840
Any multiple of 210.
105
Every multiple of 525 is a multiple of both 25 and 105.