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) |
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Revision as of 20:13, 19 October 2014
Problem
How many positive 
-digit numbers 
are there such that 
For example, 
and 
have this property but 
and 
do not.
