Find a set A of nonnegative integers so that A+A includes all the integers

0, 1, 2, 3, ..., 100. The idea is to find as small a set as you can.A+A consists of all sums a+b with a and b in A, possibly

a = b. Source: John Connett, University of Minnesota© Copyright 2000 Stan Wagon. Reproduced with permission.

4 April 2000