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Practice for your Jane Street interview

Probability-driven phone interviews and some of the industry's toughest technical rounds — prepare with real interview questions and the full Jane Street guide.

The Jane Street interview process

Jane Street reviews every application by hand, and the trading interview process starts with two to three phone interviews before a full day of final interviews, held in their office or over Zoom. All rounds are conducted by quantitative traders and feel conversational rather than quiz-like: no prior finance knowledge or advanced math is required, but sharp probability intuition is essential. Expect game theory as well: traders like to talk through game theory puzzles with you and follow how you reason about them out loud. You can filter on the Game Theory subcategory below to start practicing this type of puzzle.

Questions asked at Jane Street 142 questions

100 Light Bulbs Brain Teasers Symmetry Medium 100-Sided Die Probability and Statistics Expected Value Hard 3 Unique Marbles Probability and Statistics Combinatorial Analysis Easy 90 Cents Please Probability and Statistics Combinatorial Analysis Medium Aces for All Probability and Statistics Combinatorial Analysis Easy All Faces Probability and Statistics General Easy Free Animal Migrations Probability and Statistics Markov Chain Probability Easy Bankrupt Probability and Statistics Markov Chain Probability Easy Free Basketball Practice #1 Probability and Statistics Expected Value Medium Basketball Practice #2 Probability and Statistics Expected Value Hard Biased Coin #1 Probability and Statistics Expected Value Medium Biased Coin #2 Probability and Statistics Expected Value Easy Biased Coin #3 Probability and Statistics Expected Value Easy Biased Coin #4 Probability and Statistics Expected Value Medium Biased Coin #5 Probability and Statistics Expected Value Medium Boats on a River Math Questions General Hard Bold Betting Strategy Probability and Statistics Markov Chain Probability Medium Both Card Colors Probability and Statistics General Easy Building the Book Probability and Statistics Game Theory Medium Cash or Reroll Probability and Statistics Expected Value Easy Free Challenger's Gambit Probability and Statistics Game Theory Medium Checkmate Probability and Statistics General Easy Cheesy Choice Brain Teasers Logical Easy Choosing Blocks Math Questions General Easy Clocks and Hands Brain Teasers Logical Medium Coefficient of Variation Probability and Statistics Expected Value Hard Coin Race #2 Probability and Statistics Combinatorial Analysis Medium Coin Series #1 Probability and Statistics Markov Chain Probability Easy Coin Series #2 Probability and Statistics Markov Chain Probability Medium Coin Series #3 Probability and Statistics Markov Chain Probability Medium Coin Toss #1 Probability and Statistics Conditional Probability Medium Costly Reroll Probability and Statistics Expected Value Medium Dart Game Probability and Statistics Conditional Probability Medium Dice Game #1 Probability and Statistics Expected Value Hard Dice Game #2 Probability and Statistics Expected Value Hard Dice Order Probability and Statistics Combinatorial Analysis Medium Dice vs Coins Probability and Statistics Expected Value Medium Dice With Same Numbers Probability and Statistics Expected Value Medium Divisible Throws Probability and Statistics Expected Value Easy Double Roll Pay Probability and Statistics Expected Value Easy Drunk Student #2 Probability and Statistics Expected Value Medium Engine or Wheels Probability and Statistics Conditional Probability Easy Escape the Square Probability and Statistics Markov Chain Probability Hard First Ace Probability and Statistics Expected Value Easy Five Ascending Cards Probability and Statistics General Medium Five Deck Straight Probability and Statistics Combinatorial Analysis Medium Flip 4 Coins Probability and Statistics Expected Value Medium Flipping a Coin #1 Probability and Statistics Combinatorial Analysis Easy Flipping a Coin #2 Probability and Statistics Combinatorial Analysis Medium Flowers in Bloom Probability and Statistics Expected Value Medium Fly vs Ant Math Questions General Medium Free Ticket Probability and Statistics Expected Value Hard Gambler's Ruin #3 Probability and Statistics General Medium Going to the Beach #2 Probability and Statistics General Hard Half the Average Probability and Statistics Game Theory Medium House of Cards Brain Teasers Summation Easy How Many Children Probability and Statistics General Hard How Many Dogs Math Questions General Medium How Many Pairs Probability and Statistics Combinatorial Analysis Hard How Many Twos Brain Teasers Simplification Medium Impossible Sudoku Brain Teasers Logical Medium Infinite Chessboard Brain Teasers Out of the Box Hard Jumping Robots Probability and Statistics General Hard Jumping Toad Probability and Statistics Markov Chain Probability Medium Last Node of Singly Linked List Programming Other Medium Latency Arms Race Probability and Statistics Game Theory Easy Lower Die Probability and Statistics General Medium Magic 37 Math Questions General Hard Meeting Your Friend Probability and Statistics Combinatorial Analysis Medium More Tails Probability and Statistics Combinatorial Analysis Easy Multiply 3 Dice Probability and Statistics General Easy Free Odd Numbers Math Questions General Medium Old Phone #2 Probability and Statistics General Medium Optimal Spread Probability and Statistics General Hard Other Than Six Probability and Statistics Expected Value Easy Painted Cube Probability and Statistics Conditional Probability Hard Parking Meter Probability and Statistics Markov Chain Probability Easy Picking Balls #2 Probability and Statistics Combinatorial Analysis Medium Picking Balls #3 Probability and Statistics Combinatorial Analysis Medium Poker - Four of a Kind Probability and Statistics Combinatorial Analysis Easy Quoting Duel Probability and Statistics Game Theory Medium Racing Cars Probability and Statistics Conditional Probability Medium Random Ant Probability and Statistics Markov Chain Probability Medium Rectangles On Chessboard Math Questions General Easy Redundant Quote Probability and Statistics Game Theory Hard Region Spinner Probability and Statistics Markov Chain Probability Easy Repeating Dice Probability and Statistics Expected Value Easy Rolling Six Probability and Statistics Conditional Probability Easy Running Rabbit Probability and Statistics Combinatorial Analysis Medium Russian Roulette #1 Probability and Statistics Conditional Probability Easy Russian Roulette #2 Probability and Statistics Conditional Probability Medium Russian Roulette #3 Probability and Statistics Conditional Probability Medium Russian Roulette #4 Probability and Statistics Conditional Probability Medium Second Heads Probability and Statistics Conditional Probability Medium Set of Distinct Integers Math Questions General Easy Shuttle Wait Probability and Statistics Expected Value Easy Six Before Eleven Probability and Statistics Conditional Probability Easy Smallest Number to 10,000 Brain Teasers Logical Medium Sorting Without Sort() Programming Array and List Processing Hard Specific Card #1 Probability and Statistics Expected Value Easy Specific Card #2 Probability and Statistics Combinatorial Analysis Medium Specific Card #3 Probability and Statistics Combinatorial Analysis Medium Spin in Two Regions Probability and Statistics Expected Value Medium Spread Set Math Questions General Hard Spread Truce Probability and Statistics Game Theory Hard Squares On Chessboard Math Questions General Medium Stock Price Coin Flip Probability and Statistics Combinatorial Analysis Easy Subset of Numbers Brain Teasers Logical Hard Sum of Primes Probability and Statistics Combinatorial Analysis Easy Sum to 3 Probability and Statistics Combinatorial Analysis Medium Sum Until Success Probability and Statistics Expected Value Easy Summing Up Strings #1 Programming String Manipulation Hard Summing Up Strings #2 Programming String Manipulation Hard Tennis Game Probability and Statistics General Medium Tennis Match Mystery Brain Teasers Logical Hard Tennis Odds Probability and Statistics Game Puzzle Hard The Last Chocolate Game Brain Teasers Logical Hard Three Cards Difference Probability and Statistics Combinatorial Analysis Hard Throw a 6 #1 Probability and Statistics Expected Value Easy Throw a 6 #2 Probability and Statistics Expected Value Medium Throw a 6 #3 Probability and Statistics Expected Value Hard Throw a 6 #4 Probability and Statistics Expected Value Medium Throw Until Matched Probability and Statistics Expected Value Medium Top Two Dice Probability and Statistics Combinatorial Analysis Easy Toy Collection #2 Probability and Statistics Expected Value Easy Trailing Zeros Brain Teasers Logical Medium Trains and a Bee Brain Teasers Logical Easy Transfer 3000 Apples Brain Teasers Logical Hard Triangle on Circle Math Questions General Medium Two at a Time Probability and Statistics Expected Value Easy Two Consecutive Fives Probability and Statistics Expected Value Medium Two Dice Difference Probability and Statistics Expected Value Easy Two Digit Number Probability and Statistics General Easy Two Rolls Payoff Probability and Statistics Expected Value Easy Unfair Heads #1 Probability and Statistics Conditional Probability Medium Unfair Heads #2 Probability and Statistics Conditional Probability Medium Uniform Distribution #2 Probability and Statistics General Medium Uniform Distribution #3 Probability and Statistics General Medium Vacant Room Probability and Statistics Conditional Probability Hard Wheel of Eights Probability and Statistics Combinatorial Analysis Medium Which Die Was It Probability and Statistics Conditional Probability Medium Who Calls the Landlord Probability and Statistics Game Theory Hard