- Math Contest Problems
- Elementary Type Contests
- Estimating Sums
- Estimating Products
- Estimating Products Part 2
- Estimating Quotients
- Estimating Square Roots
- Estimating Squares of Numbers
- Estimation Golf with Timer
- Solve Simple Equations
- Finding middle Number
- Counting Elements in a List
- Counting Multiples
- Probability of Selecting a Multiple from a List
- How Many Outcomes?
- Counting with Venn Diagrams
- Spinner Probability
- More Spinner Probability
- Signed Subtraction
- Extended Subtraction
- Visual Patterns

- Middle School Type Contests
- Unit Digit of Powers
- Using Ratios
- Pythagorean Theorem
- Curve Stitching
- Converting to Another Base
- Other Number Bases
- Recognizing squares
- Function Rule-Section 1.3
- Function Table-Section 1.3
- Function Graphs-Section 1.3
- New Operations
- Probability
- Probability and Multiplication
- Probability with Lengths
- Summing a List
- How Many Divisors
- How many EVEN (or ODD) Divisors does a number have?
- Sum of all divisors of a number
- Greatest Common Divisor
- Least Common Multiple
- Simplify Factorials
- Find the Largest Prime Factor of expression with factorials
- Handshake Problem
- From 2015 National Countdown Round
- Counting Paths

- High School Type Contests
- Checkerboard Relay Problem
- Hexagonal Numbers as Relay Question
- Recursive Function as Relay Question
- Counting Handshakes as a Relay Question
- Sum of List Relay
- Base Relay
- Angle Sum Relay
- Triangular Numbers Relay
- Counting Committees as Relay Question
- Counting More Complicated Committees
- Harmonic Mean Relay
- Factors Relay
- More on Counting Committees
- Counting Marbles
- Probability with Area
- Area Between Concentric Circles

- Useful Geometry Theorems
- Useful Theorems, not Geometry