1.Knocking InstandardStochastic Calculus

Easy

2.Piecewise Volatility BarrierstandardPricing

Medium

3.BattleshipstandardGames & StrategyProbability & Statistics

Medium

4.The Best ConstantstandardCalculus & Analysis

Easy

5.Circular TradingstandardGraphs & NetworksCombinatorics

Easy

6.Coupled RecurrencestandardCombinatorics

Medium

7.Currency ArbitragestandardGraphs & NetworksPricing

Medium

8.Counting DartsstandardCombinatorics

Easy

9.Expected Maximum of DicestandardProbability & Statistics

Easy

10.Dominance SolvablestandardGames & Strategy

Medium

11.Expected ShortfallstandardPortfolio OptimizationProbability & Statistics

Easy

12.Filling the BooksstandardCombinatorics

Medium

13.Fixed PointstandardNumerical Methods

Easy

14.Cost of CarrystandardPricing

Easy

15.Gaussian QuadraturestandardNumerical Methods

Hard

16.The Implied DistributionstandardPricing

Medium

17.The Impossible Characteristic FunctionstandardProbability & Statistics

Medium

18.The Impossible CorrelationstandardLinear AlgebraProbability & Statistics

Easy

19.Limiting IntegralstandardCalculus & Analysis

Medium

20.Liquidation OrderstandardPortfolio Optimization

Easy

21.Market FragmentationstandardGraphs & NetworksCombinatoricsProbability & Statistics

Medium

22.UnderwaterstandardTime Series

Easy

23.Minimum Variance DirectionstandardLinear AlgebraPortfolio Optimization

Easy

24.Minimum VariancestandardPortfolio Optimization

Easy

25.The Mean-Reverting SpreadstandardStochastic Calculus

Easy