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Found problems: 1

1983 AIME Problems, 1
Tags: logarithm , basic maths
Let $x$, $y$, and $z$ all exceed 1 and let $w$ be a positive number such that \[\log_x w = 24,\quad \log_y w = 40 \quad\text{and}\quad \log_{xyz} w = 12.\] Find $\log_z w$.