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6
HCF(30, 36, 42) = 6 LCM(30, 36, 42) = 1260
HCF(36, 50) = 2LCM(36, 50) = 180
The GCF is 4.
The GCF is 9.
The GCF is 18.
The GCF is 12.
It is 36
36
The hcf of 12 & 36 is 12