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2009 UNCO Math Contest II Problems/Problem 1

Revision as of 16:46, 19 October 2014 by Timneh (talk | contribs) (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...")
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Problem

How many positive $3$-digit numbers $abc$ are there such that $a+b=c$ For example, $202$ and $178$ have this property but $245$ and $317$ do not.


Solution

See also

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