Problem Solving Vignettes: No. 4

[摘要] Don Rideout's article Arithmetic of Remainders in [2019: 45(3), p. 118 - 121]introduced a powerful problem solving tool { congruences. In this issue we revisitsome open problems from earlier columns and introduce a few more to get a feelfor congruences in action. All of these problems come from the course C&O 380that I took from Ross Honsberger eons ago when I was a student at the Universityof Waterloo.

[学科分类] 数学（综合）