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Home > CC1 > Chapter 3 > Lesson 3.2.4 > Problem 3-130


Find the greatest common factor and the least common multiple of each of the following sets of numbers.

  1. and

  • is a prime number, so its only factor other than itself is .

    Their greatest common factor is . Can you find their least common multiple?

  1. , and

  • To find the least common multiple, try finding multiples of and checking
    whether they are also multiples of and .

    The least common multiple is . Try finding the greatest common factor.

  1. and

  • is a factor of both of these numbers.