6=2x3 18=3^2 x 2 so take the largest factors of each 2 x3^2=18 note 18 is a multiple of itself, it is 18 x1 and 6x3=18 Doctor Chuck
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The LCM of 18 and 36 is 36. (18 x 2) and (36 x 1). Since 36 is a multiple of 18, it is automatically the LCM.
The LCM of 2 and 9 is =18
The LCM is: 126
The LCM is: 720720
so 18*10= 180 180/2= 90 90/18=5 90/10=9 So 90 is the LCM of 18 and 10