Since the trivias posted on facebook are always too easy, here's my ideas of the trivia.

1. which of the following formations is illegal? (pictures of several nontrivial formations, with some illegal and some not).
2. Which of the following players you will assign for free kick on the right side and on the left side? and in which order? (list of several players with their specs and whether each is left- or right-foot)
3. which formation is better against given formation? (choose one from several formation, given the formation of the opponent)