LCM( 14, 7, 4, 2 ) = 28
Write down multiples of each number until you find the first common multiple:
The multipliers of 14 are: 14, 28, 42, . . .
The multipliers of 7 are: 7, 14, 21, 28, 35, . . .
The multipliers of 4 are: 4, 8, 12, 16, 20, 24, 28, 32, . . .
The multipliers of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, . . .
We can see that:
LCM( 14, 7, 4, 2 ) = 28