MathDB

2019 Discrete Tiebreaker #2

Source:

October 5, 2022

2019Discrete Math Tiebreaker

Problem Statement

Let

P_1,P_2,\dots,P_{720}

denote the integers whose digits are a permutation of

123456

, arranged in ascending order (so

P_1=123456

P_2=123465

, and

P_{720}=654321

). What is

P_{144}