read left-to-right and right-to-left
Source: All-Russian Olympiad 1996, Grade 11, First Day, Problem 1
April 19, 2013
geometrygeometric transformationreflectionextremal principlenumber theory proposednumber theory
Problem Statement
Can the number obtained by writing the numbers from 1 to in order () be the same when read left-to-right and right-to-left?N. Agakhanov