Question 1170970
.


It was posted &nbsp;<U>AND &nbsp;SOLVED</U> &nbsp;several times &nbsp;(at least, &nbsp;6 times) &nbsp;recently 
(in one-two weeks) &nbsp;at this forum.



For the solution, &nbsp;see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/divisibility/lessons/Miscellaneous-problems-on-divisibility-numbers.lesson>Miscellaneous problems on divisibility numbers</A>, &nbsp;Problem &nbsp;5

at this site.