Q: What is the highest common multiple of 21 and 84?

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The common multiples of 21 and 28 are 84, 168, 252, 336, ... and so on, never ending; so there is no real Highest Common Multiple.Do you mean:Highest Common Factor - the highest number which divides both 21 and 28 which is 7; orLowest Common Multiple - the lowest number which is a multiple of both 21 and 28 which is 84.

The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 14, 21, and 28 is 84.

The LCM is: 84

The Least Common Multiple (LCM) for 6 7 12 is 84.

The common factors of 21 42 and 84 are 21

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The highest common multiple is infinite, and not very practical. The GCF is 3. The LCM is 84.

The GCF of 21 and 84 is 21, since it is a factor of 84. The LCM of 21 and 84 is 84, since it is a multiple of 21.

The common multiples of 21 and 28 are 84, 168, 252, 336, ... and so on, never ending; so there is no real Highest Common Multiple.Do you mean:Highest Common Factor - the highest number which divides both 21 and 28 which is 7; orLowest Common Multiple - the lowest number which is a multiple of both 21 and 28 which is 84.

The least common multiple of 21 , 84 , 126 = 252

Least Common Multiple is 84

The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 21 and 84 is 84.

The Least Common Multiple (LCM) for 21 28 7 is 84.

LCM(4, 21) = 84

The LCM is 84.

Any multiple of 84.

The Least Common Multiple (LCM) of (4,6,21) is 84.

84