The Australian Mathematical Society Gazettes Puzzle Corner is a regular column with entertaining mathematical puzzles, heres an example: "Final product Four real numbers can form six pairwise products. If five of the six products are 2, 3, 4, 5 and 6, what is the sixth product?" You can find the Puzzle Corner, as well as the entire Gazette online at: http://www.austms.org.au/Gazette+Volume+39+Number+4+September+2012 Check it out when you feel like trying out random fun problems, and be sure to send your solutions in. A $50 book voucher is up for grabs for the best submission. Please e-mail solutions to [email protected] or send paper entries to: Kevin White, School of Mathematics and Statistics, University of South Australia, Mawson Lakes SA 5095 The deadline for submission is 21 December 2012. The solutions will appear in the March 2013 issue of the Gazette. Thank you Ivan Guo