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MathNet 2024-part-06 — 165 problems (EN–VI) Question 48

Math Olympiad Vault · MathNet 2024-part-06 — 165 problems (EN–VI)

Question 48

Let $a \star b = a b - 2$. Compute the remainder when $(((579 \star 569) \star 559) \star \cdots \star 19) \star 9$ is divided by $100$.