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Romania NMO 2023 Grade 6 P1

Source: Romania National Olympiad 2023

April 14, 2023
Fractionsalgebra

Problem Statement

Determine all sequences of equal ratios of the form
a1a2=a3a4=a5a6=a7a8 \frac{a_1}{a_2} = \frac{a_3}{a_4} = \frac{a_5}{a_6} = \frac{a_7}{a_8}
which simultaneously satisfy the following conditions:
\bullet The set {a1,a2,,a8}\{ a_1, a_2, \ldots , a_8 \} represents all positive divisors of 2424.
\bullet The common value of the ratios is a natural number.