LCM( 18, 24 ) = 72
Write down multiples of each number until you find the first common multiple:
The multipliers of 18 are: 18, 36, 54, 72, 90, . . .
The multipliers of 24 are: 24, 48, 72, 96, . . .
We can see that:
LCM( 18, 24 ) = 72
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.