Question

What are the lcm of 4,2,4

Answer 1

4 and 4 have the same lcm...

What is the LCM (least common multiple) of 2 and 4.?

Multiples of 2 and 4

2: 0 2 4 6 8 10 12 14 16 18 20
4: 0 4 8 12 16 20 24 28 32 36 40

The least common multiple is 4

Answer 2

The least common multiple of  2  and  4  is  4 .

Here's a useful hint to keep in mind:
If the smaller number is a factor of the larger number,
then the larger number is the LCM of both of them.