Area Attack!

Area

2007, 2008, 2009

*

*

*

Bag of Tricks - Bayesian Statistics

Bayes' theorem, probability, judgement

2007

*

*

Big, Bigger, Biggest!

Factorials, comparisons, divisibility, Pascal's triangle, calculus

2008, 2009

*

*

*

*

Building Blocks

Area, Volume, Binary, optimization

2008, 2009

*

*

*

*

Candy Conundrum
(with Teacher's Guide)

Counting, probability, ratio, lattice points

Demo

*

*

*

*

Cardinal Infinity
(with bonus problems)

Counting, infinity

2008

*

*

*

Casting Out Nines

Arithmetic, remainders, answer checking

2012

*

*

Change for a Dollar

Counting, recursion

2008, 2009

*

*

*

*

*

Chess Covers and Tours

Symmetry, patterns, patience

2009

*

*

*

Coloring Cubes

Coloring, counting, cutting

2008

*

*

*

Compositions

Counting, addition, patterns

2012

*

*

*

Counting Squares: 2D, 3D, 4D

Counting, patterns, geometry

2007, 2008

*

*

*

Criss Cross

Graph theory, Euler's formula

2007, 2008

*

*

*

Cut!

Patterns, lines, planes, space

2009

*

*

*

*

Derangement

Counting, factorial, Pascal's Triangle, statistics

2007

*

*

*

*

Difference Engine

Subtraction, patterns, parity

2007, 2009

*

*

*

*

*

Diophantine Dilemma

Addition, linear equations, integers

2007

*

*

*

*

Dissections

Geometry, area, cutting, 3D

2009

*

*

*

Dominoes and Rectangles

Tiling, recursion, counting, 3D

2009

*

*

*

Divisor Game

Game theory

2007

*

*

*

*

Euler Phi

Fractions, primes, common factors, remainders

2007

*

*

*

*

A Fair Coin?

Probability

2009

*

*

*

*

Fibonacci Flips and Probability Puzzles (2007 version)
Fibonacci Flips (2008 version)

Probability, counting, recursion, Markov

2007,
2008,
2009

*

*

*

Folding Fractals

Recursion, patterns, fractals, turing machines

2008, 2009

*

*

*

Fractal Fiesta

Fractals, hands-on, dimension, geometry

2009

*

*

*

Functions Rearranged

Algebra, composing functions, maximization

2008, 2009

*

*

Generating with Grammar

Recursion, patterns, computer science

2009

*

*

*

*

Gossip

Recursion, combinatorics

2009

*

*

*

*

Making Infinity Finite

Recursion, series, limits, probability, Markov chains

2008, 2009

*

*

Kakuro Counting
Kakuro table to fill in
For Kakuro puzzles: try Kakuro Conquest or Conceptis Puzzles .
For a serious challenge, from the US Puzzle Championship, try a hard Kakuro puzzle or an extremely difficult Kakuro.

Counting, partitions, compositions

2007, 2008

*

*

*

*

*

Light Bulbs

Factors, primes, inverses

2007

*

*

*

*

*

Little Boxes

Area, fractions, infinite series

2007, 2008

*

*

*

MIMPSY: Mathematically Interesting Mechanical Puzzles Suitable for Youth.
Instant Insanity
Soma Cube
Un-Holey Cube
Square With Wonder new in 2010
by Stan Isaacs

Geometry, parity, volume, logic

2007, 2008, 2009,2010

*

*

*

*

Multiplication Table
and Tshirt design handout with a connection to Pascal

Multiplication

2007, 2008, 2009

*

*

*

Palindrome Grab!

Symmetry, game theory

2009

*

*

*

Parity Games

Even and odd, logic

2012

*

*

*

Partner Puzzles

Primes, perfect squares, addition, arrangements

2009

*

*

*

Pick's Theorem

Area, lattice polygons, pattern

2007

*

*

PIE: Principle of Inclusion and Exclusion

Counting, sets

2007

*

*

*

Pirate Puzzles

Logic

2007

*

*

*

Primes in Evenland

Primes, factorization

2012

*

*

*

*

Prisoner Probabilities, Certainties, and a Paradox

Probability, expected value, logic, patterns

2009

*

*

*

*

Pythagoras Revisited

Geometry

2008

*

*

*

Spider and the Ant

Graph theory

2007

*

*

*

Splitting Piles

Game theory

2007, 2008

*

*

*

Staring Out to Sea

Geometry, circle, tangents

2007

*

*

Stomp instructions
Stomp Grids

Parity

2007, 2008

*

*

*

*

String Polyhedra (diagrams only; for more info see Karl Schaffer's page)

Geometry, graph theory, kinesthetics

2010

*

*

Teeter Totter

Geometry

2008

*

*

Three Jugs

Logic, geometry, trilinear coordinates

2007, 2008

*

*

*

Tiling Torment

Parity

2007, 2008, 2009

*

*

*

To Twos, Too!

Sums, patterns, recursion, divisibility, binary

2008, 2009

*

*

*

*

Topology and MySpace

Sets, intersection, union, topology

2008

*

*

Tower of Hanoi

Counting, recursion

2009

*

*

*

Trapezoidal Numbers

Counting, factors, parity

2012

*

*

*

Two Mathematical Games

Game theory

2007

*

*

*

What Is Like a Square? Sets of points with few distances

Geometry, distances

2008, 2009

*

*

*

*

*

Who Took the Candy?

Game theory

2007

*

*

*

Wolves and Sheep

Counting, symmetry

2007, 2008

*

*

*

*

Zome patterns (with teacher's guide)
Zome challenges
Zome proofs

Geometry, topology

2008

*

*

*

*