scnews: "AustMS Gazette Puzzle Corner 28" by Ivan Guo

The Australian Mathematical Society Gazettes Puzzle Corner is a regular column with entertaining mathematical puzzles, heres an example: "Mean marks The final exam marks have just been released. ... UNCLUTTER for printing. AUTHENTICATE to mark the scnews
www.maths.usyd.edu.au/s/scnitm/ivang-AustMSGazettePuzzleCorner-005