sequence of digits by naturals
Source: Argentina 2000 OMA L3 p1
May 12, 2024
number theoryDigits
Problem Statement
The natural numbers are written in succession, forming a sequence of digitsDetermine how many digits the natural number has that contributes to this sequence with the digit in position .
Clarification: The natural number that contributes to the sequence with the digit in position has digits, because it is ; The natural number that contributes to the sequence with the digit at position has digits, because it is .