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QuantOS is an independent educational platform. It is not affiliated with, endorsed by, or sponsored by any trading firm. All problems are original educational content.

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Problem bank

25 published problems · original QuantOS content

  • The Capped Doubling Game

    ExtremeNumeric
    #probability#expected-value#game-theory#quant-research

    ~5:00 expected

  • One Roll or Two

    HardNumeric
    #expected-value#game-theory#quant-trading

    ~4:00 expected

  • The Broken Stick

    HardNumeric
    #probability#quant-research

    ~5:00 expected

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  • Random Walk Between Two Barriers

    HardNumeric
    #probability#sequences#quant-trading

    ~4:00 expected

  • Waiting for Back-to-Back Heads

    HardNumeric
    #probability#expected-value#sequences

    ~4:00 expected

  • Spread of 100 Coin Flips

    MediumNumeric
    #probability#estimation#statistics

    ~1:00 expected

  • Name That Distribution

    EasyShort answer
    #probability#statistics

    ~0:30 expected

  • Coffee on the Floor

    EasyMultiple choice
    #estimation#mental-math

    ~0:45 expected

  • Quadrupling the Sample

    EasyNumeric
    #estimation#statistics

    ~0:45 expected

  • Variance of a Die Roll

    MediumNumeric
    #probability#statistics#quant-research

    ~2:00 expected

  • Signals Without Double Fires

    MediumNumeric
    #combinatorics#sequences

    ~3:00 expected

  • Arranging the Letters of STATS

    MediumNumeric
    #combinatorics

    ~1:00 expected