olymmath

RMO 2015 M4

  • Mumbai Region

Find all three digit natural numbers of the form (abc)10(abc)_{10} such that (abc)10(abc)_{10} , (bca)10(bca)_{10} and (cab)10(cab)_{10} are in geometric progression. (Here (abc)10(abc)_{10} is representation in base 1010 .)

Dataset text AI-MO AoPS. Quoted with source.

Official text: Indian Regional Mathematical Olympiad 2015 official paper, page 1.

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