<ul><li>The Harvard-MIT riddle at HMMT 2025 involves solving a complex mathematical problem.</li><li>To find the sum of the prime factors of (9⁹ - 8⁸)/1001 without a calculator, clever manipulations are required.</li><li>The key is to factorize the expression and then add up the prime factors to solve the riddle.</li><li>By breaking down the numerator and denominator into prime factors, the problem can be approached systematically for a solution.</li></ul>

A Harvard-MIT Riddle That Broke Brains at HMMT 2025

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