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, 86 of them free to practise right now. 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 →
- Enlarging a square orchardMediumBrainteasersView →
- Grandmother's age from the digitsMediumBrainteasersView →
- Largest circle in a triangleMediumBrainteasersView →
- Odd multiples of threeMediumCombinatoricsBrainteasersView →
- One hundred animals for a thousand dollarsMediumBrainteasersView →
- One hundred light bulbsMediumBrainteasersView →
- Rebuilding a tower of ten ringsMediumBrainteasersProgramming & DSAView →
- Regions from ten linesMediumCombinatoricsBrainteasersView →
- Smallest simulable probabilityMediumProbabilityBrainteasersView →
- Sum of the pandigital numbersMediumCombinatoricsBrainteasersView →
- Summing digits to a millionMediumCombinatoricsBrainteasersView →
- The largest unmakeable totalMediumCombinatoricsBrainteasersView →
- The most balanced factorizationMediumBrainteasersView →
- Three-four-five in Pascal's triangleMediumCombinatoricsBrainteasersView →
- Two guards, two doorsMediumBrainteasersView →
- Two ropes, 45 minutesMediumBrainteasersView →
- 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 →
- Average of near-diagonal numbersHardCombinatoricsBrainteasersView →
- Cats and miceHardBrainteasersView →
- Cubes over the terminating denominatorsHardBrainteasersCalculusView →
- Digits with distinct pairwise sumsHardCombinatoricsBrainteasersView →
- Doors toggled by primesHardCombinatoricsBrainteasersView →
- Largest pairwise-coprime subset sumHardCombinatoricsBrainteasersView →
- Locks for a four-of-seven safeHardCombinatoricsBrainteasersView →
- Measuring two pintsHardBrainteasersView →
- Pairing with a difference of 1 or 11HardCombinatoricsBrainteasersView →
- 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 survivor in the circleHardBrainteasersView →
- Three eggs, nine dropsHardCombinatoricsBrainteasersView →
- Triangle with equal side sumsHardCombinatoricsBrainteasersView →
- Twelve balls, one oddHardBrainteasersView →
- Weighings for the odd beanHardBrainteasersView →
- When k-to-the-k is a squareHardCombinatoricsBrainteasersView →
- Cutting a cubeMediumBrainteasers Premium
- Eight coins, one lightMediumCombinatoricsBrainteasers Premium
- Last two digits of a powerMediumCombinatoricsBrainteasers Premium
- Regression to the meanMediumBrainteasersStatistics Premium
- Right angles in 12 hoursMediumBrainteasers Premium
- Squares on a chessboardMediumCombinatoricsBrainteasers Premium
- The gold chainMediumBrainteasers Premium
- The painted cubeMediumBrainteasers Premium
- Three mislabeled jarsMediumBrainteasers Premium
- Two trains and a flyMediumBrainteasers Premium
- Weighing 1 to 40MediumBrainteasers Premium
- Wine and waterMediumBrainteasers Premium
- Ages from product and sumHardCombinatoricsBrainteasers Premium
- Bertrand's chordHardProbabilityBrainteasers Premium
- Blue-eyed islandersHardBrainteasers Premium
- Defective stack of coinsHardCombinatoricsBrainteasers Premium
- Handshakes at a dinner partyHardCombinatoricsBrainteasers Premium
- Hats in a lineHardBrainteasers Premium
- Hats with 100 colorsHardBrainteasers Premium
- Last one standingHardCombinatoricsBrainteasers Premium
- Prisoners and the boxesHardProbabilityBrainteasers Premium
- Prisoners and the light switchHardBrainteasers Premium
- The racing camelsHardBrainteasers Premium
- Triangle that swallows the centerHardProbabilityBrainteasers Premium
- Two eggs, 100 floorsHardBrainteasers Premium
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