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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 points)

Deadline expired on 10 February 2015.

Statistics on problem B. 4679.
 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

•  Támogatóink: Morgan Stanley