LCM( 24, 14, 28 ) = 168
Write down multiples of each number until you find the first common multiple:
The multipliers of 24 are: 24, 48, 72, 96, 120, 144, 168, 192, . . .
The multipliers of 14 are: 14, 28, 42, 56, 70, 84, 98, 112, 126, 140, 154, 168, 182, . . .
The multipliers of 28 are: 28, 56, 84, 112, 140, 168, 196, . . .
We can see that:
LCM( 24, 14, 28 ) = 168
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.