Difference between revisions of "2009 UNCO Math Contest II Problems/Problem 1"
(Created page with "== Problem == How many positive <math>3</math>-digit numbers <math>abc</math> are there such that <math>a+b=c</math> For example, <math>202</math> and <math>178</math> have this...")
m (moved 2009 UNC Math Contest II Problems/Problem 1 to 2009 UNCO Math Contest II Problems/Problem 1: disambiguation of University of Northern Colorado with University of North Carolina)
Revision as of 21:13, 19 October 2014
How many positive -digit numbers are there such that For example, and have this property but and do not.