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Interview prep

◆Interview prep ∂Options, Greeks & markets59 ◇Trading brainteasers46 ℙProbability & statistics30 𝔼Expected value & market making13 ×Mental math & estimation10

★Classic problems28 ◧Firms ▤Guides ➜Start here ▶Practice game ◆Quandle

Track

▸Trading158 ▸Research1

Level

①Middle School1 ②High School54 ③Undergraduate99 ④Graduate11

Format

◈Explainer118 ◉Deep dive47

Pure mathematics

ℙProbability & Stats103 ∫Analysis44 ⊗Combinatorics43 ∞Recreational28 ℕNumber Theory25 ⊞Algebra25 △Geometry20 ⊢Foundations & Logic13 ƒApplied11 ∂Diff. Equations9 +School Basics8 ≈Numerical3 ⟨⟩Math & CS3 ◎Topology1

Explore/Applied & Interdisciplinary/Signal processing

Signal processing

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Sampling theorem Spectral analysis Digital signal processing Analog signal processing Audio signal processing Speech processing Multidimensional signal processing Statistical signal processing Hilbert huang transform Hilbert spectral analysis Wavelet packet decomposition Noiselet Mojette transform Cepstrum Mel frequency cepstrum Maximum entropy spectral estimation Pronys method Matching pursuit Blind deconvolution Blind equalization Deconvolution Common spatial pattern Beamforming Adaptive beamformer + 23 more

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Quant interview practice you can actually see. One question a trading desk actually asks, worked through in full — probability, brainteasers, mental math, market making.

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