olymmath

NZ-NZMO 2023 Problem 1

    For any positive integer nn let n!=1×2×3×⋯×nn! = 1 \times 2 \times 3 \times \dots \times n . Do there exist infinitely many triples (p,q,r)(p, q, r) , of positive integers with p>q>r>1p > q > r > 1 such that the product

    p!⋅q!⋅r!p!\cdot q!\cdot r!

    is a perfect square?

    Dataset text NuminaMath olympiads. Quoted with source.

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