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Home > MC1 > Chapter 7 > Lesson 7.2.3 > Problem 7-70


Find the least common multiple and the greatest common factor of the following pairs of numbers. In other words, find the smallest number that is a multiple of both of the numbers in the pair.

  1. and

    Use the Lesson 7.2.2 Math Notes box to help you with these problems.

    LCM is . GCF is .

  1. and

    Again, refer to the Math Notes box.

    is a prime number, which means its only factors are 1 and itself.

  2. and

    Refer to the Math Notes box.

    LCM is . Can you find the greatest common factor?