Q: What is the HCF and LCM of 42 and 84?

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Whenever one of the numbers is a multiple of the other, the larger number is the LCM and the smaller number is the GCF. In this case, the difference between them is 42. The highest common multiple of any set of integers is infinite.

The LCM would be 84, since 42 divides into 84 exactly twice !

LCM(21, 28, 42) = 84

6

The LCM is: 84

Related questions

84 and 14, respectively.

Whenever one of the numbers is a multiple of the other, the larger number is the LCM and the smaller number is the GCF. In this case, the difference between them is 42. The highest common multiple of any set of integers is infinite.

7

The GCF is 2.

The GCF is 21.

The LCM is: 84

The LCM is 84.

The LCM is: 126

The GCF is 42.

LCM = product/HCF; HCF is 6 so LCM = 12 x 42 = 504

The LCM of 12 and 42 is 84.

The LCM would be 84, since 42 divides into 84 exactly twice !