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Problem bank

25 published problems · original QuantOS content

  • Lattice Walk to the Corner

    MediumNumeric
    #combinatorics

    ~1:30 expected

  • Risk Committee with a Quorum

    MediumNumeric
    #combinatorics

    ~2:30 expected

  • Desk Handshakes

    EasyNumeric
    #combinatorics#mental-math

    ~0:30 expected

  • Waiting for a Six

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MediumNumeric
#probability#expected-value

~0:45 expected

  • Strictly Better Second Roll

    MediumNumeric
    #probability#combinatorics

    ~1:00 expected

  • Alternating Coin Duel

    MediumNumeric
    #probability#sequences

    ~1:30 expected

  • The Overeager Defect Detector

    MediumNumeric
    #probability#bayes#conditional-probability

    ~2:30 expected

  • Two Red Cards

    MediumNumeric
    #probability#conditional-probability

    ~1:00 expected

  • One Draw from the Urn

    EasyNumeric
    #probability#mental-math

    ~0:20 expected

  • Sum to Seven

    EasyNumeric
    #probability#combinatorics

    ~0:45 expected

  • At Least One Head

    EasyNumeric
    #probability#mental-math

    ~0:30 expected

  • Asymmetric Coin Bet

    EasyNumeric
    #expected-value#mental-math#quant-trading

    ~0:30 expected