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Quant Trader
Speed, intuition, expected value and market sense — the mental-math and game-theory muscle for trading desks (Optiver, IMC, SIG, Jane Street).
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01Mental Math & Expected Value
0/81Easy2Medium3Easy4Medium5Easy6Easy7Easy8Easy
Flips Until First HeadNext up
Probability
Roll Until All Six Faces
Probability
Two Dice Sum to 7
Probability
Expected Max of Two Dice
Probability
Sum 1 to 100
Brain Teasers
Trailing Zeros in 100!
Brain Teasers
Last Digit of 2^100
Brain Teasers
Clock Hands at 3:15
Brain Teasers
02Probability & Game Theory
0/91Easy2Easy3Easy4Medium5Medium6Medium7Medium8Medium9Hard
Coin Toss — Two Heads
Probability
Monty Hall
Probability
Two Children
Probability
Bayes — Disease Test
Probability
Birthday Problem
Probability
Drunk Passenger
Probability
Russian Roulette — Spin?
Probability
Broken Stick Triangle
Probability
Screwy Pirates
Brain Teasers
03Brain Teasers & Logic
0/504Options Intuition & Greeks
0/505Fair Value & Pricing
0/306Coding & Algorithms
0/81Easy2Medium3Medium4Medium5Medium6Medium7Easy8Medium
Two SumLeetCode
Algorithms & Numerical
Best Time to Buy and Sell StockLeetCode
Algorithms & Numerical
Best Time to Buy and Sell Stock IILeetCode
Algorithms & Numerical
Maximum Subarray (Kadane)LeetCode
Algorithms & Numerical
Gas StationLeetCode
Algorithms & Numerical
Jump GameLeetCode
Algorithms & Numerical
Nim GameLeetCode
Algorithms & Numerical
Predict the WinnerLeetCode
Algorithms & Numerical