LCM( 2, 3, 2, 5 ) = 30
Write down multiples of each number until you find the first common multiple:
The multipliers of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, . . .
The multipliers of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, . . .
The multipliers of 2 are: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, . . .
The multipliers of 5 are: 5, 10, 15, 20, 25, 30, 35, . . .
We can see that:
LCM( 2, 3, 2, 5 ) = 30