## Problem of the Week 1160## Many Pairs Dividing a SumGiven four distinct positive integers a, b, c, d, let S be their sum.
Let x Find an example where the number of the six x's that divide S is as large as possible. Source: Bart de Smit, IMO 2011. © Copyright 2012 Stan Wagon. Reproduced with permission.
19 November 2012 |