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Same Digits
Problem
There are exactly nine 2-digit numbers which have two digits the same: 11, 22, ..., 99.
How many 3-digit numbers have two digits the same?
Problem ID: 229 (10 Jul 2005) Difficulty: 2 Star
There are exactly nine 2-digit numbers which have two digits the same: 11, 22, ..., 99.
How many 3-digit numbers have two digits the same?
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