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Submit a Problem

We are always looking for new problems to add to this website. If you have an idea for a problem, please fill out the form below. Required fields have a red asterisk next to them. Thanks!


  1. Hi
    On your “about page” you describe the problems as a “closed end” meaning that they all end with the same answer.
    But many problems have more than one answer.
    Why are you describing them as Closed end

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