Problem C. 1318. (November 2015)

C. 1318. The number 518 has an interesting property. Consider the six three-digit numbers obtained with the different permutations of the digits of 518. The mean of these numbers is equal to 518. Find all three-digit numbers of different digits with this property.

(5 pont)

Deadline expired on December 10, 2015.

Statistics:

209 students sent a solution.
5 points:	81 students.
4 points:	47 students.
3 points:	16 students.
2 points:	26 students.
1 point:	25 students.
0 point:	13 students.
Unfair, not evaluated:	1 solutions.

Problems in Mathematics of KöMaL, November 2015