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TR-MO-R1 2018 Problem 12

    Tahtada başlangıçta 2018 sayısı yazılıdır. Her hamlede tahtadaki sayı silinip yerine o sayının 12 eksiği veya 9 katının 4 eksiği yazılıyor. Aşağıdaki sayılardan hangisi sonlu sayıda hamle sonucunda tahtada yazılı olabilir?

    a) 229+22^{29} + 2 b) 330+13^{30} + 1 c) 431+14^{31} + 1 d) 532+45^{32} + 4 e) 633+26^{33} + 2

    Official text Turkish Mathematical Olympiad, first round 2018 official paper, page 5. Quoted with source.

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