The LCM is: 216
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HCF of 12 and 18 is 6 and LCM of 108 and 72 is 216 So: 6 times 216 = 1296
The LCM is 432.
It is: 72
72
The least common multiple of 18 and 72 is 72. Since 18 is a factor of 72, 72 is automatically the LCM of the pair.