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First things first: if you have any questions, complaints, doubts or reservations, don't hesitate to contact us (Thomas and Michel). After every break there will also be a small round-up for discussions.

The basic challenges

1. Count the number of events
2. Count the number of registered players
3. Count the number of players registered per month
4. Find the most popular quizzes
5. Look for inactive players
6. Look for active players

Advanced challenges