Which mathematical technique revolutionized e-commerce product recommendations and is credited with increasing Amazon's annual revenue by approximately 35% when first implemented?

In today's data-driven e-commerce landscape, mathematical algorithms drive everything from product recommendations to inventory management. This trivia question explores how leading e-commerce platforms leverage advanced mathematics to optimize their operations and enhance user experience. Test your knowledge about the intersection of mathematical modeling and digital retail strategy!

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Collaborative filtering using matrix factorization
Binary classification trees with gradient boosting
Markov chain Monte Carlo simulations
K-means clustering with Euclidean distance metrics