Question 1050129
.
The number is divisible by 9 if and only if the sum of its digits is divisible by 9.


See the lesson 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/divisibility/lessons/Divisibility-by-9-rule.lesson>Divisibility by 9 rule</A> 

in this site.


Therefore 3771, 3681, 3861, 3051 are the solutions, for example.