N is a positive integer and S(N) denotes the sum of the digits.
Find all values of a positive integer constant C such that:
S(N) = C*S(N+3)
(In reply to Possible solution
I was thinking the same and have thougth to do an example with C=23. (22*6=132=6+9*14).
So that 32999999999999997 sum is 138=23*6
(6 is the sum of 33*10^15.). C=23.
Posted by armando
on 2016-05-28 15:14:04