There is an infinite number of common multiples for these numbers!
Common multiples of 7 and 5 include 35, 70, 140, etc.
35,70,105.140
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]).
35..
35
35
Any multiple of 105.
The least common multiple of the numbers 12, 5 and 7 is 420.
315
The LCM of (5, 6, 7) is 210.
35 and 70 both have 7 and 5 as prime factors
Any multiple of 105.