Problem:
Kate bakes a 20 -inch by 18 -inch pan of cornbread. The cornbread is cut into pieces that measure 2 inches by 2 inches. How many pieces of cornbread does the pan contain?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
The total area of cornbread is . Because each piece of cornbread has area , the pan contains pieces of cornbread.
OR
When cut, there are pieces of cornbread along a long side of the pan and pieces along a short side, so there are pieces.
The problems on this page are the property of the MAA's American Mathematics Competitions