Problem B. 4679. (January 2015)
B. 4679. Prove that among any 39 consecutive natural numbers there is a number in which the sum of the digits is divisible by 11.
(3 pont)
Deadline expired on 10 February 2015.
Statistics:
104 students sent a solution.  
3 points:  77 students. 
2 points:  10 students. 
1 point:  9 students. 
0 point:  8 students. 
