1978 IMO Problems/Problem 1

Problem

$m$ and $n$ are positive integers with $m < n$ . The last three decimal digits of $1978^m$ are the same as the last three decimal digits of $1978^n$ . Find $m$ and $n$ such that $m + n$ has the least possible value.

Solution

This problem needs a solution. If you have a solution for it, please help us out by adding it.

Solution is available here: https://www.youtube.com/watch?v=SRl4Wnd60os

Page

Toolbox

Search

1978 IMO Problems/Problem 1

Problem

Solution