Coins in a Row (addition, game)

Coins in a Row (addition, game)

Coins in a Row (Peter Winkler 2003) This is not an original MathPickle puzzle. It’s from Mathematical Puzzles: A Connoisseur’s Collection (163 pages, 2003) by Peter Winkler. Spoiler Alert! The solution is in the video below. Teaching is an...
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...
Packing Pasta (estimate, measure, volume)

Packing Pasta (estimate, measure, volume)

Packing Pasta (MathPickle, 2019) This problem is good to introduce volume and density calculations to a classroom. Top students and those interested can continue to the greatest packing website in recreational mathematics: Erich’s Packing Center. The pages...
Lazy Toad Puzzles (counting, symmetry)

Lazy Toad Puzzles (counting, symmetry)

If you have not seen the original jumping frogs puzzle you might want to watch the video below – paying special attention to the lazy toads. This exploration starts out with an exploration of lily pads linked together – but not necessarily in a line. The...