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LCM of 12 and 21 is 84, which is also a multiple of 28 so 84 is your answer.

Q: What is the LCM of 12 21 and 28?

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The LCM of 12, 18, 21 and 28 is 252. The LCM of 121821 and 28 is 487284

LCM(21, 28, 42) = 84

The LCM is: 84

LCM of 12 and 28 is 84.

LCM(6, 21, 28) = 84.

Of each of them on their own respectively is 28, 21 and 9. together is 252

The LCM is 420.

The Least Common Multiple (LCM) for 273 21 28 is 1,092.

The LCM of 12, 23, 28, and 43 is 83,076.

The LCM is 84.

The greatest common factor of 12, 18, and 28 is 2.The prime factorization of 12 is 2*2*3The prime factorization of 18 is 2*3*3The prime factorization of 28 is 2*2*7So the greatest common factor of the set is 2.

The Least Common Multiple (LCM) of 35, 21, and 28 is 420.