LCM( 12, 34 ) = 204
Write down multiples of each number until you find the first common multiple:
The multipliers of 12 are: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180, 192, 204, 216, . . .
The multipliers of 34 are: 34, 68, 102, 136, 170, 204, 238, . . .
We can see that:
LCM( 12, 34 ) = 204
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.