listing 3-digit numbers with 6 from 9 digits
Source: 2022 May Olympiad L1 p2
September 5, 2022
number theory
Problem Statement
Bob chose six of the nine digits from to and wrote the list, ordered from smallest to largest, of all three-digit numbers that can be formed using the digits you chose. At Bob's list, the number appears at position . What number appears at position in the list from Bob? Find all possibilities.