algebra

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LCM of 4 and 20 is 2 or 4. Which one?

GCF for 11 and 31 is 1?


GCF for 14 and 21 is 7?

  • algebra -

    The least common multiple is a number that both numbers can divide evenly. It's at least as large as the largest of the pair of numbers. Therefore the LCM of 4 and 20 is NOT 2 or 4.

    Your other two answers are correct.

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