You need to find the gcf of 256 and 400 would you rather list their factors or use the prime factorization

If you were looking for the greatest common factor, you'd want to see the list of their factors.

A prime factorization breaks it down as far as possible and as a result has as few high numbers as possible. If you want the number to be as great as possible, you would want to see the list of all the factors.

"if it is my birthday, then it is snowing"

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart