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There is really no such thing as a "highest common multiple". Once you find the least common multiple of a set of numbers, you can keep adding the LCM to itself over and over again. Each new number you get will be a common multiple of your set of numbers, but each new number will always be larger than the previous. This means that you can keep adding while the number approaches infinity and you will still never find a highest multiple.

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9y ago
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7y ago

The highest common multiple of any set of integers is infinite.

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Q: What is the highest common multiple In 7 and 8?
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What what is the highest common multiple of 4 and 8?

The highest common multiple is infinite. The GCF is 4. The LCM is 8.


What is the highest common multiple of 4 and 8?

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The least common factor of any group of two or more numbers is always 1. The greatest common factor of 3, 5, 7, and 8 is also 1. The least common multiple (LCM) is the multiple of the highest power of prime factors in two or more numbers. Example: LCM of 3, 5, 7, and 8 is 840, which is the multiple of the highest power of all their prime factors, 23 x 3 x 5 x 7.