It is: 6
18
138
6 is.
The LCM is: 54
420
Six and three can both go into any multiple of their least common multiple (LCM), which is six. This means they can divide evenly into numbers like 6, 12, 18, 24, and so on. Additionally, any multiple of three can be divided by three, while only multiples of six can be divided by six.
168 is the least common multiple of 56 and 84
12
30
12
12
42