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QUANT PREP GUIDES
Everything we know about quant online assessments and interview screening: formats, techniques, and training plans. Free, no signup.
OPTIVER SALARY IN 2026
A flat $150,000 US base across researchers, traders and engineers in both 2024 and 2025 — half of Jane Street's, and why that does not mean half the pay.
▶ READ · 9 MINJANE STREET SALARY IN 2026
A flat $300,000 base filed for both traders and researchers, what the $300,000 internship number converts to weekly, and why aggregators run 40% higher.
▶ READ · 10 MINCITADEL SECURITIES SALARY IN 2026
The posted $4,500–$5,800 weekly intern range, a $250,000 researcher median across 43 filings, and why it is not the same firm as Citadel.
▶ READ · 9 MINQUANT SALARY GUIDE 2026
Base salaries from US Department of Labor filings at Jane Street, Citadel Securities, Jump, Two Sigma and Five Rings, plus total comp by level and what the filings leave out.
▶ READ · 14 MINQUANT INTERN PAY IN 2026
Weekly rates, program length and housing across Jane Street, SIG, Citadel Securities, HRT and Optiver — converted so the offers can actually be compared.
▶ READ · 12 MINQUANT PAY BY CITY IN 2026
New York, Chicago, Miami, London and Amsterdam compared, and why the non-US figures are so much softer than the US ones.
▶ READ · 10 MINBEST QUANT INTERVIEW PREP TOOLS IN 2026
An honest look at Zetamac, TraderMath, QuantGuide, Brainstellar, the standard books, and where each one helps. Prices checked September 2026.
▶ READ · 11 MINHOW TO PREPARE FOR QUANT ONLINE ASSESSMENTS
What quant OAs test, how scoring and timing work, a two-week preparation plan, and the mistakes that cost candidates offers.
▶ READ · 8 MINMENTAL MATH FOR QUANT INTERVIEWS
Left-to-right arithmetic, complements, fast multiplication, conversion tables, target speeds, and a four-week training plan.
▶ READ · 9 MINQUANT INTERVIEW PRACTICE QUESTIONS (WITH ANSWERS)
14 realistic questions across mental math, sequences, probability, and logic, each with a worked answer and the technique behind it.
▶ READ · 10 MINWHAT QUANT FIRMS TEST IN INTERVIEWS AND OAs
How market makers, prop shops, and hedge funds weight speed and depth, with practical priorities for each firm type.
▶ READ · 7 MIN5 MENTAL MATH TRICKS FOR FASTER MULTIPLICATION
Five worked shortcuts for two-digit multiplication: near-100 numbers, halve and double, difference of squares, rounding, and splitting.
▶ READ · 4 MIN5 PROBABILITY SHORTCUTS FOR QUANT INTERVIEWS
Five ways to shorten probability problems using complements, expectation, symmetry, conditioning, and combinations.
▶ READ · 5 MINHOW TO SOLVE NUMBER SEQUENCES FASTER
A fast five-step checklist for differences, ratios, alternating rules, recurrences, familiar families, and digit patterns.
▶ READ · 5 MINHOW TO ANSWER ESTIMATION QUESTIONS IN QUANT INTERVIEWS
A worked method for Fermi questions, including assumptions, a market-sizing example, a cross-check, and common mistakes.
▶ READ · 6 MINOPTIVER ONLINE ASSESSMENT GUIDE
Commonly reported mental math, numerical logic, probability, and attention sections, with original questions and a seven-day plan.
▶ READ · 8 MINIMC ONLINE ASSESSMENT GUIDE
Prepare for number sequences, analytical reasoning, mental math, and role-specific tests with worked examples and a focused plan.
▶ READ · 8 MINSIG ONLINE ASSESSMENT GUIDE
Probability, expected value, combinatorics, and quantitative reasoning preparation with original questions and clear format caveats.
▶ READ · 8 MINFIVE RINGS ONLINE ASSESSMENT GUIDE
Train estimation, probability, expected value, and mental math for a fast quantitative screen without relying on leaked questions.
▶ READ · 8 MINMARKET MAKING INTERVIEW QUESTIONS
How to price uncertain payoffs, quote a bid-ask spread, manage inventory, and explain your reasoning with eight original worked examples.
▶ READ · 8 MINWHAT IS QUANT FINANCE?
A plain-English introduction to quantitative finance, the work it covers, and the kind of thinking it rewards.
▶ READ · 5 MINQUANT TRADER VS. RESEARCHER VS. DEVELOPER
The differences in daily work, strengths, and interview focus across the three main quant career paths.
▶ READ · 6 MINHOW HARD IS IT TO BREAK INTO QUANT FINANCE?
An honest view of the competition, what candidates can control, and a realistic route into the field.
▶ READ · 5 MINHOW MUCH DOES QUANT FINANCE PAY?
How quant compensation works, why headline figures vary, and how to compare roles sensibly.
▶ READ · 4 MINHOW TO GET INTO QUANT FINANCE
A practical roadmap for choosing a role, building skills, finishing a project, and preparing to apply.
▶ READ · 6 MINCITADEL SECURITIES TRADER INTERVIEW GUIDE
What the firm publicly says it looks for, what it does not publish about the trading loop, and the skills worth training.
▶ READ · 7 MINJANE STREET TRADING INTERVIEW GUIDE
Why finance knowledge is not the bar, what collaborative problem solving means in practice, and how to prepare for it.
▶ READ · 7 MINQUANT TRADER INTERVIEW PREP
The trader track stage by stage, a four-week plan, the habits interviewers reward, and what to skip entirely.
▶ READ · 6 MINPROBABILITY INTERVIEW QUESTIONS
Nine worked questions across complements, conditional probability, Bayes, expectation, and symmetry arguments.
▶ READ · 7 MINEXPECTED VALUE INTERVIEW QUESTIONS
Fair value, optimal stopping, linearity of expectation, and the cases where expected value is the wrong answer.
▶ READ · 7 MINWHAT IS A GOOD ZETAMAC SCORE?
What a score means in seconds per problem, why no firm publishes a cutoff, and a two-week plan for faster arithmetic.
▶ READ · 6 MINQUANT BRAINTEASER INTERVIEW QUESTIONS
Ten worked puzzles grouped by the habit that solves them: small cases, working backwards, invariants, and counting outcomes.
▶ READ · 8 MINCOMBINATORICS INTERVIEW QUESTIONS
Arrangements, stars and bars, lattice paths, inclusion-exclusion, and derangements, with a check for every count.
▶ READ · 8 MIN