Problem of the Week


Solutions due by high noon on Friday, Oct 31.

Friday the 13th Since this problem is due on Halloween, we’ll consider a horror theme about conjectures related to Friday the 13th.  Prove or disprove each of the conjectures. 

  1. If January 13th is on a Friday, that year will feature exactly three Friday the 13ths.
  2. If a year has exactly three Friday the 13ths, the first one will be in January. 
  3. Every year has at least one Friday the 13th. 

 You may access a PDF file for the POW here or at the Sakai site.

This problem is brought to you by Prof. Robin Lock.

Submit your solutions to Choong-Soo Lee. You may leave a hard copy in his mailbox or submit an electronic file via email or Sakai.  Good luck!

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