TL;DR
Buffon's Needle Problem: A canonical quantitative trading interview question at intermediate difficulty. Commonly asked at Two Sigma, DE Shaw, Citadel.
By Valenke Exam Prep Team·Last updated 2026-06-01
intermediateGeometric Probability
Buffon's Needle Problem
Asked at: Two Sigma, DE Shaw, Citadel
Problem
A needle of length is dropped on a floor with parallel lines spaced apart (). What is the probability the needle crosses a line? How does this relate to ?
Related concepts
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