MathDB
a list of 2018 numbers , max last no 2018 May Olympiad L1 p1

Source:

August 24, 2021
algebra

Problem Statement

Juan makes a list of 20182018 numbers. The first is 1 1. Then each number is obtained by adding to the previous number, one of the numbers 1 1, 22, 33, 44, 55, 66, 77, 8 8 or 99. Knowing that none of the numbers in the list ends in 00, what is the largest value you can have the last number on the list?
Back to ProblemsView on AoPS