Guides

Methods and worked examples for every question type in quant trading online tests and interviews.

• How to solve Beat the Odds questions

  Probability: dice, cards, coins, conditional, Bayes, expected value and gambler's ruin. Skip anything that needs more than a minute. Press 1 to 5 to choose an option.

• How to solve NumberLogic questions

  Find the next number. Check differences, second differences, ratios, alternating patterns and Fibonacci-style sums.

• How to solve Likelihood-list questions

  Rank three events from most to least likely. Fix the denominator first, then check subsets. Press 1 to 6 to choose a ranking.

• How to solve Intervals questions

  Estimate a number with a lower and an upper bound. You score lower divided by upper if the true value is inside, and 0 if it is outside. You can type 340m, 1.5b or 3e8.

• How to solve Orderbooks questions

  Each board shows bids and asks for A, B and the bundle A+B. Find the trade that locks in a risk-free profit, or say there is none. Press 1 to 6.

• How to solve Speed arithmetic questions

  Integers, decimals, fractions and percents, typed. Fractions like 7/8 are accepted. This is the Flow Traders and Akuna math test style: skip anything slow.

• How to solve Expected value questions

  Harder probability: waiting times, order statistics, optimal stopping, gambler's ruin, Kelly, symmetry tricks. The level reported for SIG, IMC, Citadel Securities, DRW and trader phone screens.

• How to solve Options basics questions

  Put-call parity, spread and straddle payoffs, the at-the-money rule of thumb, time value and delta hedging. Rates are zero unless the question says otherwise.

• How the projected score works

  How sessions of any length become one score on the real test's scale.

Firm guides

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