TL;DR
Estimating Square Roots by Linearization: A canonical quantitative trading interview question at foundation difficulty. Commonly asked at Optiver, SIG, Akuna Capital, IMC, Flow Traders.
By Valenke Exam Prep Team·Last updated 2026-06-01
foundationMental Approximation
Estimating Square Roots by Linearization
Asked at: Optiver, SIG, Akuna Capital, IMC, Flow Traders
Problem
Without a calculator, estimate:
1.
2.
3.
Each answer should be accurate to within 1%.
Related concepts
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