optimization

2

arithmetic

6

fibonacci sequence

1

number theory

5

sequences & series

4

modular arithmetic

2

algebra

6

geometry

2

triangle inequality

1

figurate numbers

1

system of equations

1

lattice paths

1

quadratic sequences

1

triangles

2

euclidean geometry

1

random walk

1

binomial coefficients

1

pure math

3

complimentary counting

1

statistics

1

averages

1

combinatorics

4

logic

1

truth & liars

1

prime numbers

1

no calculator

6

midsegment theorem

1

prime factorization

2