View source for 2009 UNCO Math Contest II Problems/Problem 1

== 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 property but <math>245</math> and <math>317</math> do not.


== Solution ==

== See also ==
{{UNC Math Contest box|year=2009|n=II|before=First Question|num-a=2}}

[[Category:Introductory Algebra Problems]]