84, 168, 252, 336, 420, 504 . . .
Write the first 6 Multiples of 12 and 14.
The multiples of 2 between 7 and 15 are 8, 10, 12, and 14.
When they get to 336
84, 168, 252
Multiples of 6: 12, 18, 24 Multiples of 7: 14, 21, 28
420 is the LCM
Any multiple of 84
1 and 2 are common factors. 84 and 168 are common multiples.
The Least Common Multiple (LCM) for 10 12 14 is 420.
None of those are multiples of ten.
Any multiple of 420.
The lowest common multiple is 84