Proposed problems should be submitted online at americanmathematicalmonthly.submittable.com/submit.

Proposed solutions to the problems below should be submitted by December 31, 2020, via the same link. More detailed instructions are available online. Proposed problems must not be under consideration concurrently at any other journal nor be posted to the internet before the deadline date for solutions. An asterisk (*) after the number of a problem or a part of a problem indicates that no solution is currently available.

中文翻译：

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问题与解决方案

建议的问题应在线提交至americanmathematicalmonthly.submittable.com/submit。

以下问题的建议解决方案应在 2020 年 12 月 31 日前通过同一链接提交。在线提供更详细的说明。提出的问题不得在任何其他期刊同时考虑，也不得在解决方案的截止日期之前发布到互联网上。问题编号或问题的一部分后的星号 (*) 表示当前没有可用的解决方案。