MathDB
Problems
Contests
National and Regional Contests
PEN Problems
PEN A Problems
115
115
Part of
PEN A Problems
Problems
(1)
A 115
Source:
5/25/2007
Does there exist a
4
4
4
-digit integer (in decimal form) such that no replacement of three of its digits by any other three gives a multiple of
1992
1992
1992
?
Divisibility Theory