## 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?

Problem ID: 229 (10 Jul 2005) Difficulty: 2 Star