Mathematical and Physical Journal
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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 February 10, 2015.


104 students sent a solution.
3 points:77 students.
2 points:10 students.
1 point:9 students.
0 point:8 students.

Problems in Mathematics of KöMaL, January 2015