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HMMT 2023 A2

  • Algebra and Number Theory
  • Answer

Compute the number of positive integers n≤1000n \leq 1000 such that lcm⁡(n,9)\operatorname{lcm}(n, 9) is a perfect square. (Recall that lcm denotes the least common multiple.)

Dataset text NuminaMath olympiads. Quoted with source.

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