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2003 AIME I Problems/Problem 9

Revision as of 20:09, 6 August 2006 by Me@home (talk | contribs) (→‎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

See also

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