American Mathematical Monthly Problems - 2019

The American Mathematical Monthly is an expository journal intended for a wide audience of mathematicians, from undergraduate students to research professionals. Each issue has a Problems and Solutions section where several new problems are proposed. Below you can find the solutions that I've submitted this year (pdfs will be available after the deadline). As regards the previous years, you can take a look through the following links (but beware of nerd sniping ): 2018 (36), 2017 (40), 2016 (50), 2015 (48), 2014 (41), 2013 (29), 2012 (22), 2011 (22), 2010 (15), 2009 (13), 2008 (16), 2007 (15), 2006 (16), 2005 (22), 2004 (13), 2003 (13), 2002 (6), 2001-1993 (19).
For anyone who is interested in sharing hints and solutions, please feel free to contact me at:


Problem 12145 - 09 - T. Amdeberhan and V. Moll (USA).

Problem 12144 - 09 - Nguyen Minh Ha and Tran Quang Hung (Vietnam).

Problem 12143 - 09 - J. A. Scott (UK).

Problem 12142 - 09 - C. Chiser (Romania).

Problem 12141 - 09 - R. Tauraso (Italy).

Problem 12136 - 08 - Albert Stadler (Switzerland).

Problem 12134 - 08 - P. Bracken (USA).

Problem 12132 - 08 - K. S. Bhanu and M. Deshpande, and P. G. Dixit (India).

Problem 12129 - 07 - H. Ohtsuka (Japan).

Problem 12128 - 07 - O. Kouba (Syria).

Problem 12127 - 07 - O. Furdui and A. Sintamarian (Romania).

Problem 12126 - 07 - M. Tetiva (Romania).

Problem 12124 - 06 - M. Omarjee (France).

Problem 12120 - 06 - M. Bataille (France).

Problem 12118 - 06 - H. Ohtsuka (Japan).

Problem 12117 - 05 - M. Bataille (France).

Problem 12116 - 05 - R. Thaper (USA).

Problem 12115 - 05 - M. Dragan (Romania).

Problem 12114 - 05 - Z. Franco (USA).

Problem 12113 - 05 - R. P. Stanley (USA).

Problem 12110 - 04 - P. J. Rodriguez de Rivera and A. Plaza (Spain).

Problem 12107 - 04 - C.I. Valean (Romania).

Problem 12106 - 04 - H. Ohtsuka (Japan).

Problem 12105 - 04 - G. Brookfield (USA).

Problem 12103 - 03 - G. Apostolopoulos (Greece).

Problem 12102 - 03 - O. Furdui and A. Sintamarian (Romania).

Problem 12101 - 03 - Hojoo Lee (South Korea).

Problem 12099 - 03 - M. Bataille (France).

Problem 12098 - 03 - L. Giugiuc (Romania) and K. Altintas (Turkey).

Problem 12094 - 02 - P.F. Refolio (Spain).

Problem 12092 - 02 - M. Diao and A. Wu (USA).

Problem 12091 - 02 - C. I. Valean (Romania).

Problem 12090 - 02 - H. Ohtsuka (Japan).

Problem 12088 - 01 - F. Stanescu (Romania).

Problem 12086 - 01 - M. O. Sanchez (Peru) and L. Giugiuc (Romania).

Problem 12085 - 01 - J. DeVincentis, S. Wagon, and M. Elgersma (USA).

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Problem 12084 - 01 - G. Stoica (Canada).

Problem 12083 - 01 - A. Belabes (Morocco).