AustMS Gazette Puzzle Corner 34

The Australian Mathematical Society Gazette’s Puzzle Corner is a regular column with
entertaining mathematical puzzles, here’s an example: 

"Tessellation test 

Tess is trying to draw an n-sided convex polygon which can be tessellated by a finite
number of parallelograms.  For which n will Tess be able to succeed?" 

You can find the Puzzle Corner 34 online at:
http://www.austms.org.au/Publ/Gazette/2013/Sep13/Puzzle.pdf 

Check it out when you feel like trying out some fun problems, and be sure to email your
solutions to [email protected].  A $50 book voucher is up for grabs for the best
submission.  The deadline for submissions is 1 November 2013.  The solutions will appear
in the March 2014 issue of the Gazette.  

Thank you 

Ivan Guo