Explore the format

Sample Questions

25 representative questions from the full library. Select one to see the complete question and answer.

Probability + Brainteasers

7 questions
  1. Ping Pong Game
  2. Grid: E[XY]
  3. Bertrand Paradox 1
  4. Decoding Cards
  5. Optimal Stopping Rule: Marbles
  6. Random Walk: Boys and Girls
  7. Handshakes on Chessboard

Stochastic Calculus + Option Theory

6 questions
  1. Greeks vs.Time to Maturity
  2. Highest Gamma
  3. Long Maturity
  4. Butterfly Spread Arbitrage 2
  5. Straddle Delta
  6. Delta of an At-the-Money Binary Option at Expiry

Statistics + ML + Time Series Analysis

7 questions
  1. Functional Gradient Descent
  2. Duplication Summary
  3. ACF vs.PACF
  4. From Fair Coin To Simulating a p Event
  5. Best Prediction of X given X+Y=n
  6. Equicorrelation Matrix
  7. Sharpe Ratio and the t-Statistic

Python + Data Science Libraries + DSA

5 questions
  1. Matrices: Transpose a Matrix
  2. Hash Maps: Python Trick
  3. Practice Question: Scope of Variables
  4. Practice Question: Shallow Copy vs Deep Copy
  5. Practice Question: Dict Keys