Three Color Triangle Puzzles (logic, algorithm)

Three Color Triangle Puzzles (logic, algorithm)

Three Color Triangle Puzzles (MathPickle 2021) This logic puzzle is inspired by the brilliant Mathologer video below. The tricks presented above are proved below.  Playing with these puzzles is good for upper elementary, but younger kids can get a lot of value from...
Rainbow Sudoku (logic puzzle)

Rainbow Sudoku (logic puzzle)

Rainbow Sudoku (MathPickle 2021 – Inspired by Amar Sodhi) In regular sudoku and pentomino sudoku numbers are given as clues. Each region needs exactly one copy of each number. That’s true whether the regions are 3×3 squares or pentominoes. In Rainbow...
Treefolk Tribes (symmetry, sorting, sequence)

Treefolk Tribes (symmetry, sorting, sequence)

Treefolk Tribes (MathPickle 2020)   This puzzle doesn’t have a strong endpoint – you’re exploring for the sake of exploring! Organizing these Treefolk based on their symmetry – whether they want you to or not 😉 Here is a pdf of the seven...
Emoji Democracy (counting, fractions, shapes)

Emoji Democracy (counting, fractions, shapes)

Emoji Democracy Democracies can be attacked by altering the boundaries of voting regions. This has been done in many countries from Apartheid’s South Africa to Hong Kong under the Chinese Communist Party. Its English word is “gerrymandering.” In this...
Pin Board Murders (patterns, angles, discussion)

Pin Board Murders (patterns, angles, discussion)

Solving murder mysteries have police making connections between underworld characters. Strings are pinned up between existing suspects. New subjects are pinned up.  It all looks like a big mess. But never fear! We are here to bring order to this chaos! Hopefully, our...