matthias beck

problems (and solutions)

• (with Akalu Tefera and Melkamu Zeleke) Sum of a sequence of floors and ceilings, Mathematics Magazine 71, no. 5 (1998), 390-391.
• A congruence involving ceilings, American Mathematical Monthly 109, no. 1 (2002), p. 77.
  A solution (by Nasha Komanda) appeared in American Mathematical Monthly 110, no. 8 (2003), p. 747.
• (with Marcin Mazur and Shelemyahu Zacks) "Ordinary" spherical triangles, American Mathematical Monthly 110 (2003), p. 956.
  A solution (by Richard Stong) appeared in American Mathematical Monthly 112, no. 7 (2005), p. 660.
• (with Jesus A. Deloera, Mike Develin, and Julian Pfeifle) Some linear recurrences, American Mathematical Monthly 111 (2004), p. 440.
  A solution (by the Northwestern University Math Problem Solving Group) appeared in American Mathematical Monthly 113, no. 1 (2006), 84-85.
• (with Richard Ehrenborg and Thomas Zaslavsky) Magic squares and nontransitive dice, American Mathematical Monthly 111, no. 7 (2004), 625-626.
  A solution (by Michael R. Avidon and John H. Lindsey II) appeared in American Mathematical Monthly 113, no. 5 (2006), 464-465.
• (with Alexander Berkovich) An absolute value sum, American Mathematical Monthly 115, no. 3 (2008), p. 263.
  Solutions (by Byron Schmuland and Allen Stenger) appeared in American Mathematical Monthly 117, no. 1 (2010), 92-93.