Rosh Hashana Trivia

1. Where in the Torah does it say that we need to blow/hear a shofar on Rosh Hashana?
2. What is the minimum size of the shofar that may be used on Rosh Hashana?
3. What/who/why/where_______________________________________________?

(Have participants at your Shabbos/Yom Tov seuda create their own Rosh Hashana trivia questions and ask them to the people around the table.)