In our kick-off event, we want to do a little game/puzzle with our new first semester students. They are from computer science and data science study programs, but in general, they cannot code yet. We are now searching for ideas for such a game/puzzle that thematically is close to computer science or mathematics. (There are plenty of ideas for general team-building events, of course.)
The most problematic constraint: We have about 400 students. They are in groups of about 60 people (one per study program) which would give about 10 teams per group. Any game/puzzle -- especially if it uses analogue material -- has to scale up to these numbers. E.g. a maths-themed scavenger hunt across campus is probably not possible. And we really want to have a meat-space component instead of a fully online game/puzzle.
So.. Has anyone done something at that scale that is explicitly maths-/comp-sci-flavoured and can give me an idea?