Last digit of a power of 8
Source: Problem 6 of Russian Regional Olympiad 2009 Grade 9
September 19, 2011
number theory proposednumber theory
Problem Statement
Positive integer is such that the sum of decimal digits of equals 8. Can the last digit of be equal 6?(Author: V. Senderov)(compare with http://www.artofproblemsolving.com/Forum/viewtopic.php?f=57&t=431860)