Mathematics Problem Of the Week

Spring 2005

POW 4: An Odd Product

Here is a multiplication:

   E E O
   x O O
  ---------
   E O E O
   E O O
  ---------
  O O O O O

All even digits are replaced with E and all odd with O. What was the multiplication?

1) Provide an explanation for your reasoning.

2) Partial solutions will be accepted! (Although they are not as good as complete solutions.)

Due Friday, February 18^th , at Noon.

Solutions should be submitted to Dr. Maegan Bos’ mailbox in the Math office or sent via e-mail to mbos@stlawu.edu

Presentation counts! The prize-winning entry will be selected from all correct submissions, based on the clarity, creativity and elegance of the solution.

Look for the SLU POW on the Web at http://it.stlawu.edu/~math/activities/