American Postal Codes
  • In the United States, the U. S. Postal Service uses Zip Codes (postal codes) to route mail to various regions on the country. Zip codes are five digit numbers that can begin with zero. How many U. S. zip codes are possible such that the product of the digits is even?

Answer:    
  Please enter a numerical answer
(ex. 1000 or 2.033) and click GO.		    

Contest problems and answers provided by:

David Rock
rock_david@colstate.edu
Columbus State University

Doug Brumbaugh
brumbad@pegasus.cc.ucf.edu
University of Central Florida