GCF-LCM Homework - page 3

Name ______________

  1. Juan has decided to make party baskets for the fund raiser. Balloons are sold in bags of 20 and there are 8 candy bars in a package. How many of each should he buy so there are an equal number of balloons and candy bars in each basket?
    Multiples of 20: ___________________________
    Multiples of 8: __________________________
    LCM = _____ .
        He should buy ___ bags of balloons and ____ packages of candy bars.

  2. A radio station is having a promotion in which every 12th caller receives a free concert ticket and every 15th caller receives a limo ride. Which caller will be the first one to win both?
    This is an LCM problem:
        Multiples of 12: _________________________
        Multiples of 15: _________________________    LCM = _____.

      The ____th caller will win both.

  3. I want to plant 81 corn plants and 63 tomato plants in my garden. If I put the same number of plants in each row and each row has only one type of plant, what is the greatest number of plants I can put in one row?
    This is a GCF problem:
        Factors of 81: ____________________
        Factors of 63: ____________________
    GCF = _____ plants in one row.

  4. [Extra credit]
    The GCF two numbers is 6 and their LCM is 36. If one of the numbers is 18, find the other number.
        GCF(a,b) = (a x b) / LCM(a,b)

        b = ____