Answer:
Marie can divide her cookies into groups of 9, 6, or 4
Explanation:
Marie has made 3 dozen cookies = 3 x 12 = 36 cookies
To form equal groups, she needs the same number of cookies in each group.
We know she can divide them into groups from 4 to 9 groups.
To get equal groups, we look for factors of 36 from 4 to 9
For 4 groups, 36/4 = 9 cookies per group
For 6 groups, 36/6 = 6 cookies per group
For 9 groups, 36/9 = 4 cookies per group
She can therefore divide into groups of 9, 6, or 4.