300 people in a circle, last person standing wins
Source: II Soros Olympiad 1995-96 R1 9.7 https://artofproblemsolving.com/community/c2416727_soros_olympiad_in_mathematics
June 2, 2024
combinatoricsnumber theory
Problem Statement
people took part in the drawing for the main prize of the television lottery. They lined up in a circle, then, starting with someone who received number , they began to count them. Moreover, every third person dropped out every time. (So, in the first round, everyone with numbers divisible by dropped out). The counting continued until there was only one person left. (It is clear that more than one circle was made). This person received the main prize. (It “accidentally” turned out to be the TV director’s mother-in-law). What number did this person have in the initial lineup?