Outcry
The Guide Book
A written strategy guide for every game in the arcade - the rules, how scoring works, the technique that raises your score, and one fully worked example each. 68 guides across 13 labs.
Brain Teasers
Brain Teasers LabA shelf of classic logic and game-theory puzzles, each played as an animated story that makes you commit to an answer before revealing the reasoning.Read the guide →Screwy PiratesFive rational pirates vote on how to split 100 gold coins, and you work out the split by backward induction from a one-pirate crew up.Read the guide →Tiger and SheepA hundred rational tigers and one sheep on a magic island, where any tiger that eats becomes a sheep itself - solved by induction on parity.Read the guide →The Split DealThe prisoner's dilemma played as a story: two thieves, separate rooms, and one offer each.Read the guide →Stag or HareThe stag hunt as a story: two equilibria, and a choice that comes down to trust.Read the guide →One Offer, No DiscussionThe ultimatum game as a story: one split of 100 pounds, one accept-or-reject, no negotiation.Read the guide →The Growing PotThe centipede game as a story: a pot that doubles on every pass, and logic that says take it immediately.Read the guide →Two-Thirds of the RoomThe Keynesian beauty contest as a story: pick the number closest to two-thirds of the room's average.Read the guide →One Seat in the BoatThe wolf, goat and cabbage river crossing as a story - seven crossings, one backward move.Read the guide →The Office BetThe birthday problem as a story: a colleague bets that two of the 23 people in the room share a birthday.Read the guide →The Third DoorThe Monty Hall problem as a story: you pick a door, the host opens a goat, and offers a switch.Read the guide →The Line of HatsThe hundred-prisoner hat line as a story: one word each, and a parity code that saves 99.Read the guide →The Rope BridgeThe torch-and-bridge puzzle as a story: speeds of 1, 2, 5 and 10, and a storm 17 minutes out.Read the guide → Quitters Never Lose
BlackjackReal 4-deck blackjack with live exact bust probabilities and a Hi-Lo counting check under a pit-boss timer.Read the guide →Russian RouletteA shrinking elimination wheel where every safe spin compounds a 97%-of-fair multiplier and every wrong answer marks another losing number.Read the guide →Pick 3A real Pick 3 lottery ticket where every play type - Straight, Box, Pair - carries the identical 50% house edge.Read the guide →Pick 4Four digits, a $5,000 Straight, Front/Back 3 bets - and the same exact 50% house edge on every play type.Read the guide →Pick 5Five digits and a $50,000 Straight at 1 in 100,000 - the biggest jackpot in the lab, at the same 50% house edge.Read the guide →Scratch-Off (Timed, 7 Questions)Scratch tickets with the odds printed face-up: 7 probability questions per ticket on a 5:15 clock, then a buy-or-walk decision.Read the guide →Scratch-Off (Timed, 13 Questions)The deep timed scratch-off: 13 probability questions per ticket on a 9:45 clock before every buy-or-walk decision.Read the guide →Scratch-Off (Untimed, 7 Questions)Scratch tickets with the prize table face-up and no clock: 7 probability questions per ticket, then buy or walk away.Read the guide →Scratch-Off (Untimed, 13 Questions)The full-depth untimed scratch-off: 13 probability questions per ticket across all six topics, then a buy-or-walk decision.Read the guide → Algorithm Arena
DP Table BuilderFill a dynamic-programming memo table cell by cell, from given base cases and a stated recurrence, until the final answer falls out.Read the guide →Mini Task - RookieA rookie-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - Rookie (First Challenge)A rookie-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - NoviceA novice-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - Novice (First Challenge)A novice-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - IntermediateA intermediate-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - Intermediate (First Challenge)A intermediate-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - AdvancedA advanced-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Mini Task - Advanced (First Challenge)A advanced-level coding challenge: two warm-up questions, real code run against real tests in your browser, then two wrap-up questions.Read the guide →Monte Carlo EstimatorEstimate pi by throwing random points at a circle, watch the error shrink with sample size, and internalize why halving the error always costs four times the samples.Read the guide →Speed RoundTen multiple-choice questions, twenty seconds each, drawn from a shuffled pool spanning complexity, dynamic programming, Monte Carlo, and pandas.Read the guide → Drill Lab
Arithmetic DrillA 20-card flashcard race across twelve arithmetic categories - play solo or race a ghost recording of a real past run.Read the guide →Fermi Estimation (Classic)Quote a low-high range on ten real-world estimation questions - points for containing the truth, more points for a tight range.Read the guide →Fermi Estimation (Technical)Timed estimation - dice boards, grid paths, counting and random walks, plus vol-scaling and latency shortcuts from live rounds - scored on relative width like a quoted market.Read the guide →Sequence SprintFind the rule and type the next number - freshly generated arithmetic, geometric, square, alternating, and Fibonacci-style sequences.Read the guide →Duck Duck DashAn endless runner through a sunny field where the only way to hop is answering a mental-math question - one collision ends the run.Read the guide →Likelihood RankingOrder outcomes from most to least likely - student score tables, distributions, dice and card events, Poisson arrivals, urns, and scatter plots.Read the guide →Crossroad MultitaskerA duck at a 4-way crossroad and four corner math pods - answer whichever question is live as it switches unpredictably between the two streams.Read the guide → Mock Screens
DRW Quantitative ChallengeSix substantial probability, stats, Markov, regression, game-theory and logic problems in 45 minutes, with no negative marking and no going back.Read the guide →Quant Research ScreenA 26-item, 40-minute online assessment. Fourteen items on probability and stochastic processes, then twelve on look-ahead bias, survivorship bias and multiple comparisons.Read the guide →Quant Developer Online AssessmentFour auto-graded coding problems against hidden tests and a performance gate, plus a ten-item concurrency and complexity code-review section.Read the guide →Risk Analyst ScreenA single 25-minute, 18-item sitting modelled on bank and clearinghouse risk screens - VaR, Expected Shortfall, correlation breakdown, fat tails, and short gamma, with no negative marking.Read the guide →Economic Consulting Analyst ScreenA single 35-minute, 22-item sitting on the core of economic-consulting analyst work - difference-in-differences, instrumental variables, omitted variable bias and antitrust market-definition math, with no negative marking.Read the guide →Actuarial Analyst ScreenA single 30-minute, 20-item sitting modelled on SOA/CAS-style entry-level actuarial screening - life contingencies, compounding survival, annuity valuation, loss development, and ruin theory, with no negative marking.Read the guide →Optiver Trading AssessmentA six-section, ~85-minute sitting modelled on Optiver's published screening battery - rapid mental math, numeric sequences, ranked-likelihood judgment, expected-value reasoning, and two working-memory/pattern rounds, with negative marking wherever the real test uses it.Read the guide →SIG Problem-Solving AssessmentA single 20-minute sitting of 17 probability and logic problems drawn from a recycled archetype bank - the pre-resume screen SIG is reported to send every candidate before anyone reads their application.Read the guide →Citadel Dual Online AssessmentTwo back-to-back timed screens modelled on Citadel's reported OA pipeline - a 50-item general cognitive speed test, then a 15-item probability OA covering Bayes, Markov chains, combinatorics, and hypothesis testing.Read the guide →