What's the most popular number in Hacker News titles? Two consecutive titles on the HN front page yesterday had a 6 in them. This means nothing. But it’s the sort of nothing that lodges in your brain until you do something about it, so what is the most popular number in Hacker News titles? ClickHouse hosts the full HN dataset in their public playground, and I am exactly the kind of person who finds that exciting. The obvious query is barely a query at all: SELECT num, count() AS c FROM ( ...