Final answer:
To make enough cookies to fill 24 boxes containing 6 cookies each, you need to make 12 dozen cookies.
Step-by-step explanation:
To find out how many dozen cookies you need to make, you need to divide the total number of cookies by 12.
In this case, there are 24 boxes with 6 cookies each, so the total number of cookies is 24 x 6 = 144.
Dividing 144 by 12 gives us 12 dozen cookies.