2003 AIME II Problems/Problem 9: Difference between revisions
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== Problem == | == Problem == | ||
An integer between 1000 and 9999, inclusive, is called balanced if the sum of its two leftmost digits equals the sum of its two rightmost digits. How many balanced integers are there? | |||
== Solution == | == Solution == | ||
{{solution}} | {{solution}} | ||
Revision as of 12:52, 11 March 2007
Problem
An integer between 1000 and 9999, inclusive, is called balanced if the sum of its two leftmost digits equals the sum of its two rightmost digits. How many balanced integers are there?
Solution
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