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The least common multiple of 4 and 20 is 20.

Split each operator into its prime components and then count each prime. Combine the largest counts of each prime together and multiply.

4 gives you two 2's.

20 gives you one 5 and two 2's.

combine counts to get one 5 and two 2's, for an answer of 20.

If one operator is divisible by the other, the answer will always be the largest of the operators.

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7y ago

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