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by loeg 2393 days ago
If you're medium fast, they start out in the single digit or tens of minutes range and ramp up to some 60+ minute puzzles the last handful of days (but also some 20 minute puzzles, it varies a lot).

I haven't done it since 2017, and I was pretty quick (made that year's overall leaderboard), but on average they took me about 23 minutes (for both parts).