Medium Combinatorics Interview Questions
Medium is where most real interview questions sit. This is the combinatorics set worth spending the most time in.
82 questions, all free to practise.
- A family clustered at a round tableMediumCombinatoricsView →
- A prime sum on prime diceMediumProbabilityCombinatoricsView →
- A relay team with a feudMediumCombinatoricsView →
- Aces in a seven-card handMediumCombinatoricsExpected ValueView →
- An ace for everyoneMediumProbabilityCombinatoricsView →
- An ace in every pileMediumProbabilityCombinatoricsView →
- An ace in the handMediumProbabilityCombinatoricsView →
- Anagrams of LOLLIPOPMediumCombinatoricsView →
- Balanced parenthesesMediumCombinatoricsProgramming & DSAView →
- Boy–girl neighbors in a lineMediumCombinatoricsExpected ValueView →
- Chords that don't crossMediumProbabilityCombinatoricsView →
- Climbing stairsMediumCombinatoricsProgramming & DSAView →
- CompositionsMediumCombinatoricsView →
- Counting straightsMediumProbabilityCombinatoricsView →
- Deleting every other number on a circleMediumCombinatoricsBrainteasersView →
- Derangements of four itemsMediumCombinatoricsView →
- Distinct die labelingsMediumCombinatoricsBrainteasersView →
- Distinct faces in five rollsMediumCombinatoricsExpected ValueView →
- Distributing candies with a capMediumCombinatoricsView →
- Eight coins, one lightMediumCombinatoricsBrainteasersView →
- Eight dice summing to twelveMediumProbabilityCombinatoricsView →
- Emptying the cherry bowlMediumProbabilityCombinatoricsView →
- Exactly two aces in a bridge handMediumProbabilityCombinatoricsView →
- Expected ascents in a shuffleMediumCombinatoricsExpected ValueView →
- First HH on the tenth tossMediumProbabilityCombinatoricsView →
- Five distinct ranksMediumProbabilityCombinatoricsView →
- Four distinct birth monthsMediumProbabilityCombinatoricsView →
- Full housesMediumProbabilityCombinatoricsView →
- Identical balls, no empty boxMediumCombinatoricsView →
- Inversions in a shuffleMediumCombinatoricsExpected ValueView →
- Keeping a couple togetherMediumCombinatoricsView →
- Keeping two apartMediumCombinatoricsView →
- Large sum given a sixMediumProbabilityConditional Probability & ExpectationView →
- Last two digits of a powerMediumCombinatoricsBrainteasersView →
- Lattice paths in 3DMediumCombinatoricsView →
- Math books stay togetherMediumCombinatoricsView →
- Median of a list and its squaresMediumCombinatoricsStatisticsView →
- Monotone paths across a gridMediumCombinatoricsView →
- No face card before the two of heartsMediumProbabilityCombinatoricsView →
- No two evens adjacentMediumCombinatoricsView →
- No two heads in a rowMediumProbabilityCombinatoricsView →
- No two neighboring bulbs litMediumProbabilityCombinatoricsView →
- Non-attacking rooksMediumCombinatoricsView →
- Odd multiples of threeMediumCombinatoricsBrainteasersView →
- Odd solutions to a sumMediumCombinatoricsView →
- One card each in casino warMediumProbabilityCombinatoricsView →
- One random subset inside anotherMediumProbabilityCombinatoricsView →
- Onto functionsMediumCombinatoricsView →
- Pair at a round tableMediumCombinatoricsView →
- Pairing up six peopleMediumCombinatoricsView →
- Paths dodging a closed intersectionMediumCombinatoricsView →
- Paths on a 4×3 gridMediumCombinatoricsView →
- Placing operators among digitsMediumCombinatoricsView →
- Position of the first spadeMediumCombinatoricsExpected ValueView →
- Power of three in a factorialMediumCombinatoricsView →
- Probability of three of a kindMediumProbabilityCombinatoricsView →
- Red faces on a diced cubeMediumCombinatoricsExpected ValueView →
- Regions from ten linesMediumCombinatoricsBrainteasersView →
- Spaced onesMediumCombinatoricsView →
- Squares on a chessboard, tilted ones includedMediumCombinatoricsBrainteasersView →
- Subsets with no neighborsMediumCombinatoricsView →
- Sum of 10 with three diceMediumProbabilityCombinatoricsView →
- Sum of multinomial coefficientsMediumCombinatoricsView →
- Sum of the pandigital numbersMediumCombinatoricsBrainteasersView →
- Summing digits to a millionMediumCombinatoricsBrainteasersView →
- Ten dice, sum divisible by sixMediumProbabilityCombinatoricsView →
- Terms in a multinomial expansionMediumCombinatoricsView →
- The birthday problemMediumProbabilityCombinatoricsView →
- The die that makes sums uniformMediumProbabilityCombinatoricsView →
- The largest unmakeable totalMediumCombinatoricsBrainteasersView →
- The same number of tailsMediumProbabilityCombinatoricsView →
- The third shiny pennyMediumProbabilityCombinatoricsView →
- The two black aces, side by sideMediumProbabilityCombinatoricsView →
- Three dots, exactly one shared edgeMediumProbabilityCombinatoricsView →
- Three ones in a rowMediumProbabilityCombinatoricsView →
- Three unlabeled teamsMediumCombinatoricsView →
- Three-four-five in Pascal's triangleMediumCombinatoricsBrainteasersView →
- Tiling a stripMediumCombinatoricsView →
- Trailing zeros of 100!MediumCombinatoricsView →
- Two face cardsMediumProbabilityCombinatoricsView →
- Units digit of a random powerMediumProbabilityCombinatoricsView →
- Variance of hearts in eight cardsMediumCombinatoricsStatisticsView →
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