
Difficulty 
Name 
Topic 
Years 
1 
2 
3 
4 
5 

Area 
2007, 2008, 2009 
* 
* 
* 



Bayes' theorem, probability, judgement 
2007 
* 
* 




Area, volume, binary, optimization 
2008, 2009 
* 
* 
* 
* 
* 

Counting, probability, ratio, lattice points 
Demo 
* 
* 
* 
* 


Counting, infinity 
2008 


* 
* 
* 

Counting, recursion 
2008, 2009 
* 
* 
* 
* 
* 

Symmetry, patterns, patience 
2009 
* 
* 
* 



Coloring, counting, cutting 
2008 
* 
* 
* 



Counting, patterns, geometry 
2007, 2008 
* 
* 
* 



Graph theory, Euler's formula 
2007, 2008 
* 
* 
* 



Patterns, lines, planes, space 
2009 
* 
* 
* 
* 


Counting, factorial, Pascal's Triangle, statistics 
2007 
* 
* 
* 
* 


Subtraction, patterns, parity 
2007, 2009 
* 
* 
* 
* 
* 

Addition, linear equations, integers 
2007 
* 
* 
* 
* 


Geometry, area, cutting, 3D 
2009 

* 
* 
* 


Game theory 
2007 
* 
* 
* 
* 


Tiling, recursion, counting, 3D 
2009 

* 
* 
* 


Fractions, primes, common factors, remainders 
2007 
* 
* 
* 
* 


Probability 
2009 

* 
* 
* 
* 

Probability, counting, recursion, Markov 
2007 

* 
* 
* 


Recursion, patterns, fractals, turing machines 
2008, 2009 

* 
* 
* 


Fractals, handson, dimension, geometry 
2009 
* 
* 
* 



Algebra, composing functions, maximization 
2008, 2009 

* 
* 



Recursion, patterns, computer science 
2009 
* 
* 
* 
* 


Recursion, combinatorics 
2009 

* 
* 
* 
* 

Recursion, series, limits, probability, Markov chains 
2008, 2009 


* 
* 


Factors, primes, inverses 
2007 
* 
* 
* 
* 
* 

Area, fractions, infinite series 
2007, 2008 
* 
* 
* 



Symmetry, game theory 
2009 

* 
* 
* 


Primes, perfect squares, addition, arrangements 
2009 
* 
* 
* 



Area, lattice polygons, pattern 
2007 
* 
* 




Logic 
2007 

* 
* 
* 


Probability, expected value, logic, patterns 
2009 
* 
* 
* 
* 


Geometry 
2008 

* 
* 
* 


Graph theory 
2007 
* 
* 
* 



Game theory 
2007, 2008 

* 
* 
* 


Geometry, circle, tangents 
2007 

* 
* 



Geometry 
2008 


* 
* 


Logic, geometry, trilinear coordinates 
2007, 2008 
* 
* 
* 



Parity 
2007, 2008, 2009 
* 
* 
* 



Sums, patterns, recursion, divisibility, binary 
2008, 2009 
* 
* 
* 
* 


Sets, intersection, union, topology 
2008 

* 
* 



Counting, recursion 
2009 

* 
* 
* 


Game theory 
2007 
* 
* 
* 



Counting, symmetry 
2007, 2008 
* 
* 
* 
* 




