LCM= least common multiple. so the LCM of two numbers 21 and 14 is 42. because 42 is the least multiple that both numbers have in common! =) your welcome!, anytime!
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Least Common Multiple (LCM) for 4 14 21 is 84.
For 70, 35, 21, 14 the LCM is: 210
The LCM is: 378
The LCM is: 210
84