For years, GVMA had a yearly conference in November until Covid. Each conference involved a dinner in which the following Dinnertime Math were created. Each table would fill out the questions and submit for marking. The winning table would get a prize.
As I look back over these questions, there are definitely some gems I'll put elsewhere.
These are all PDF's.
2013 - Interview Questions (Solutions at the End)
2014 - Riddles (Solutions at the End)
2015 - 20 Problems (Solutions at the End)
2019 - 5 Problems (Solutions at the End)