LCM( 42, 96 ) = 672
Write down multiples of each number until you find the first common multiple:
The multipliers of 42 are: 42, 84, 126, 168, 210, 252, 294, 336, 378, 420, 462, 504, 546, 588, 630, 672, 714, . . .
The multipliers of 96 are: 96, 192, 288, 384, 480, 576, 672, 768, . . .
We can see that:
LCM( 42, 96 ) = 672
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.