You need at least two numbers to compare multiples.
The least common multiples of the number 6 and 9 is 3.
90 is the least common multiple of 9 and 10
lcm(4, 9) = 36 → the two least common multiples (ie the first two common multiples) of 4 and 9 are 36 and 72.
The common multiples of 9 and 16 are 144, 288, 432 and so on.
The Least Common Multiple of 9 and 15 is 45.
The Least Common Multiple (LCM) for 9 24 is 72.
3
3
18.
72
There are plenty of common multiples, but only one can be the least; thus the least common multiple of 3, 6, 9 is 18.
Each common multiple of 9 and 10 occurs exactly once (in the list of common multiples), so there is no common multiple that occurs the most. All common multiples of 9 and 10 are the multiples of their least common multiple which is 90.