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 Apr 21 comment Sorting the digits of $\pi$ @MichaelHardy I came here to make sure that I understood the problem fully precisely because I knew I didn't. English is my third language so I have no intention whatsoever to show off my english. Thanks for your constructive criticism. Apr 21 comment Sorting the digits of $\pi$ Also, "best candidate" is clearly subjective and relative to what the actual position is. Best at what? If you're going to say "I'm sorry I don't understand" and not ask for clarifications every time I ask you to do something that isn't mathematically correct, what value do you have in a business? Apr 21 comment Sorting the digits of $\pi$ @TonyK The question is essentially what jdods wrote in the comments. But I want you to get there from a question that while not academically correct, clearly hints where I'm trying to get at. Being able to handle that is, imo, a much more valuable skill than being able to identify the actual solution. I completely appreciate why this might not be the best community for that, but I wanted to make sure I got the maths of it right in case candidate asks. Apr 21 comment Sorting the digits of $\pi$ @JoelReyesNoche I meant a real number, I have no idea how to type the fancy symbols :) I've updated the question to clarify the comma. Apr 21 comment Sorting the digits of $\pi$ I can't really agree. I'm not interviewing for a math post doc position, I care about how you deal with an abstract problem that doesn't necessarily make sense. And just looking at the comments of the question there's so many open questions the interviewee would have to consider before trying to rush an answer. If you tell me the question makes no sense and you can justify it then congratulations, you passed! Thanks for the advice anyway :) Apr 21 comment Sorting the digits of $\pi$ @AndrewD.Hwang edited. Apr 21 comment Sorting the digits of $\pi$ @MPW Good catch! Assume the comma is placed after a fixed finite amount of numbers Apr 21 comment Sorting the digits of $\pi$ @lulu That's kind of the part I like about the question. At no point I'll mention programming when asking it nor expect them to code anything. It's a pure math thought experiment Apr 21 comment Sorting the digits of $\pi$ @lulu I'd say it's 0 again because it has infinite zeroes. I'm considering using this question as an interview question for software developers to see how they deal with non well defined problems and want to make sure I get the facts right at least. If you think the answer is that there is no answer without further information, that's fine. I'm mostly interested in whether the discussion that comes out of the question statement is interesting enough or not. Jul 4 comment Probability of someone being born the same day as you in a group of N people. I don't, just assume we were all born on a normal year :)