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