olymmath

OIM 2025 Problem 3

    Sejam bb e nn inteiros positivos com b≥2b \geq 2. Define-se sb(n)s_b(n) como a soma dos dígitos de nn escrito na base bb. Existe algum inteiro n≥2n \geq 2 tal que

    s2(n)≥s3(n)≥⋯≥s2025(n)?s_2(n) \geq s_3(n) \geq \cdots \geq s_{2025}(n)?

    Nota: Os dígitos de nn escrito na base bb são os números inteiros a0,a1,…,aka_0, a_1, \ldots, a_k tais que n=a0+a1b1+a2b2+⋯+akbkn = a_0 + a_1 b^1 + a_2 b^2 + \cdots + a_k b^k, com ak≠0a_k \neq 0 e 0≤ai≤b−10 \leq a_i \leq b - 1 para i=0,1,…,ki = 0, 1, \ldots, k.

    Official text Iberoamerican Mathematical Olympiad 2025 official paper, page 1. Quoted with source.

    A model read this text from the scan of the paper by OCR, with vision/local (GLM-OCR-8bit). No person has checked it against the paper yet.

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