TR-MO-R1 2021 Problem 18

$a$ , $b$ , $c$ ve $k$ pozitif tam sayılar olmak üzere, $a+b+c=939$ ve $a\cdot b\cdot c$ sayısı $10^k$ ile tam bölünüyorsa, $k$ en fazla kaç olabilir?

a) 5 b) 6 c) 7 d) 8 e) 9

Official text Turkish Mathematical Olympiad, first round 2021 official paper, page 10. Quoted with source.

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