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126
504
lcd(9, 6) = 18.
LCD(7, 9, 2) = 126.
The LCD or LCM is 504
LCD(7,9,13) = 7*9*13 which is 819
The LCD of 6 and 7 is 42
lcd for 33,27 and 9 is 297
LCD is 24
63
It is: 18