Brainteasers Interview Questions for Quant Researchers
Quant Researchers get asked brainteasers differently from other quant roles - the emphasis shifts with what the job actually does. This is that slice.
111 questions, all free to practise. The split is 29 easy, 42 medium, 40 hard.
- A factorial ratio that's a factorialEasyBrainteasersView →
- A mile with no windEasyBrainteasersView →
- A multiple of 15 in ones and zerosEasyBrainteasersView →
- A ratio of Fibonacci sumsEasyBrainteasersView →
- A root of a product plus oneEasyBrainteasersView →
- A sum of three cubesEasyBrainteasersView →
- Age in a square yearEasyBrainteasersView →
- All the squares on a chessboardEasyCombinatoricsBrainteasersView →
- An alternating sum of squaresEasyBrainteasersView →
- An infinite nested radicalEasyBrainteasersView →
- Clock angle at 3:15EasyBrainteasersView →
- Coin rolling around a coinEasyBrainteasersView →
- Counting nines to 1000EasyCombinatoricsBrainteasersView →
- Handshakes at four couplesEasyCombinatoricsBrainteasersView →
- How many sixes on the die?EasyExpected ValueBrainteasersView →
- Integers that contain a zeroEasyCombinatoricsBrainteasersView →
- Lapping on the trackEasyBrainteasersView →
- Matching locks to keysEasyBrainteasersView →
- Polygons with integer anglesEasyBrainteasersView →
- Solving a linear Diophantine equationEasyBrainteasersView →
- The largest unmakeable postageEasyBrainteasersView →
- The price of a triangular gardenEasyBrainteasersView →
- The weight of the fishEasyBrainteasersView →
- Three raids on the flockEasyBrainteasersView →
- Timing the revolverEasyBrainteasersView →
- Unchanged after ten swingsEasyProbabilityBrainteasersView →
- When the clock hands next meetEasyBrainteasersView →
- When the colony outgrows its life supportEasyBrainteasersCalculusView →
- Winning by a growing marginEasyProbabilityBrainteasersView →
- 1000 bottles, one poisonedMediumBrainteasersView →
- 25 horses, 5 tracksMediumBrainteasersView →
- A cube ending in elevenMediumProbabilityBrainteasersView →
- Adults before the busMediumBrainteasersView →
- Age a fraction of the birth yearMediumBrainteasersView →
- Average salary, kept privateMediumBrainteasersStatisticsView →
- Balancing six- and eight-sided diceMediumExpected ValueBrainteasersView →
- Cats and dogs on the streetMediumBrainteasersView →
- Coin-pile NimMediumBrainteasersMarket Making & Betting GamesView →
- Cutting a cube into 27MediumBrainteasersView →
- Deleting every other number on a circleMediumCombinatoricsBrainteasersView →
- Digits multiplying to half the numberMediumBrainteasersView →
- Digits of concatenated powersMediumBrainteasersView →
- Distinct die labelingsMediumCombinatoricsBrainteasersView →
- Eight coins, one lightMediumCombinatoricsBrainteasersView →
- Enlarging a square orchardMediumBrainteasersView →
- Grandmother's age from the digitsMediumBrainteasersView →
- Largest circle in a triangleMediumBrainteasersView →
- Last two digits of a powerMediumCombinatoricsBrainteasersView →
- Odd multiples of threeMediumCombinatoricsBrainteasersView →
- One hundred animals for a thousand dollarsMediumBrainteasersView →
- One hundred light bulbsMediumBrainteasersView →
- Painted cube, one face showingMediumProbabilityBrainteasersView →
- Rebuilding a tower of ten ringsMediumBrainteasersProgramming & DSAView →
- Regions from ten linesMediumCombinatoricsBrainteasersView →
- Regression to the meanMediumBrainteasersStatisticsView →
- Right angles in 12 hoursMediumBrainteasersView →
- Smallest simulable probabilityMediumProbabilityBrainteasersView →
- Squares on a chessboard, tilted ones includedMediumCombinatoricsBrainteasersView →
- Sum of the pandigital numbersMediumCombinatoricsBrainteasersView →
- Summing digits to a millionMediumCombinatoricsBrainteasersView →
- The gold chainMediumBrainteasersView →
- The largest unmakeable totalMediumCombinatoricsBrainteasersView →
- The most balanced factorizationMediumBrainteasersView →
- The painted cubeMediumBrainteasersView →
- Three mislabeled jarsMediumBrainteasersView →
- Three-four-five in Pascal's triangleMediumCombinatoricsBrainteasersView →
- Two guards, two doorsMediumBrainteasersView →
- Two ropes, 45 minutesMediumBrainteasersView →
- Two trains and a flyMediumBrainteasersView →
- Weighing 1 to 40MediumBrainteasersView →
- Wine and waterMediumBrainteasersView →
- A Fibonacci power sumHardBrainteasersView →
- A coin thick enough to land on its sideHardProbabilityBrainteasersView →
- A flea's shortest escape across a boxHardBrainteasersCalculusView →
- A geometric series that sums to a squareHardBrainteasersView →
- A triangle of consecutive integersHardBrainteasersView →
- A weighted sum of binomialsHardCombinatoricsBrainteasersView →
- Ages from product and sumHardCombinatoricsBrainteasersView →
- Average of near-diagonal numbersHardCombinatoricsBrainteasersView →
- Bertrand's chordHardProbabilityBrainteasersView →
- Blue-eyed islandersHardBrainteasersView →
- Cats and miceHardBrainteasersView →
- Cubes over the terminating denominatorsHardBrainteasersCalculusView →
- Defective stack of coinsHardCombinatoricsBrainteasersView →
- Digits with distinct pairwise sumsHardCombinatoricsBrainteasersView →
- Doors toggled by primesHardCombinatoricsBrainteasersView →
- Handshakes at a dinner partyHardCombinatoricsBrainteasersView →
- Hats in a lineHardBrainteasersView →
- Hats with 100 colorsHardBrainteasersView →
- Largest pairwise-coprime subset sumHardCombinatoricsBrainteasersView →
- Last one standingHardCombinatoricsBrainteasersView →
- Locks for a four-of-seven safeHardCombinatoricsBrainteasersView →
- Measuring two pintsHardBrainteasersView →
- Pairing with a difference of 1 or 11HardCombinatoricsBrainteasersView →
- Prisoners and the boxesHardProbabilityBrainteasersView →
- Prisoners and the light switchHardBrainteasersView →
- Rotations divisible by 37HardCombinatoricsBrainteasersView →
- Shuffles to restore the deckHardCombinatoricsBrainteasersView →
- Smallest number with digit product 10000HardCombinatoricsBrainteasersView →
- Sum of repeating decimalsHardCombinatoricsBrainteasersView →
- Sums of fours and fivesHardCombinatoricsBrainteasersView →
- The number with no new digitsHardBrainteasersView →
- The racing camelsHardBrainteasersView →
- The survivor in the circleHardBrainteasersView →
- Three eggs, nine dropsHardCombinatoricsBrainteasersView →
- Triangle that swallows the centerHardProbabilityBrainteasersView →
- Triangle with equal side sumsHardCombinatoricsBrainteasersView →
- Twelve balls, one oddHardBrainteasersView →
- Two eggs, 100 floorsHardBrainteasersView →
- Weighings for the odd beanHardBrainteasersView →
- When k-to-the-k is a squareHardCombinatoricsBrainteasersView →
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