TL;DR
Logarithm Estimation Using Key Anchors: A canonical quantitative trading interview question at intermediate difficulty. Commonly asked at SIG, Optiver, Jane Street, Akuna.
By Valenke Exam Prep Team·Last updated 2026-06-01
intermediateMental Approximation
Logarithm Estimation Using Key Anchors
Asked at: SIG, Optiver, Jane Street, Akuna
Problem
Estimate , , and mentally with less than 2% error. What anchor values and interpolation techniques do you use?
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