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Cono sur olympiad 1995

Source:

May 28, 2006

Problem Statement

We write the digits of 19951995 in the following way: 199511999955111999999555......199511999955111999999555...... 1. Determine how many digits we have to write such that the sum of the written digits is 28802880. 2.Which digit is in position number 19951995?
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