prime factors of 18 are 2 and 32
prime factors of 24 are 23 and 3
prime factors of 42 are 2, 3 and 7
LCM = 23*32*7 = 504
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The LCM is 1848.
LCM(21, 42, 18) = 126
The LCM is 9324.
The Least Common Multiple (LCM) of 12, 42, and 24 is 168.
The GCF and LCM of 24 and 42 are 6 and 168 respectively.