Ask HN: Best 60 minute interview question that can be fairly graded?

Looking for questions where you can give a score between 1-100, assessing various things like speed, thoughtfulness, correctness, planning, and the ability for wrong solutions to still get a solid score in the 70s.

Leetcodes are welcome, but no pass or fail tests. If you pick a Leetcode, please explain what aspects of a (possible) solution mean something to you (e.g they know Binary Trees).

Question is open to all, not just interviewers.

Edit: This is not a ‘best’ take home assignment question, that’s a whole different topic.