# Erich Friedman Puzzles

Erich Friedman is a prolific puzzle author. I first became acquainted with his work through the Puzzle Box Books. I’ve recreated several of his puzzles for my classroom: Arrows Puzzle, Ducks and Snakes Puzzle, Equation Rotation Puzzle, Connect the Dots, and Hidden Equation.

Recently, I discovered his homepage that is chock-full of enough free puzzles to keep you busy for a lifetime. Here are a few of my favorites:

## More Printable Paper and Pencil Logic Puzzles

- Product Square Puzzle
- Blank Sudoku Grid Printable
- Sixes Number Challenge
- 3-1-4 Pi Day Number Challenge
- Sankaku Puzzles
- Strimko Puzzles in the Classroom
- Square Sudokus
- Make It Pythagorean Puzzles
- Number Ball Puzzles by Naoki Inaba
- Hidato Puzzles
- Step Puzzles by Naoki Inaba – A Logic Puzzle for Introducing Arithmetic Sequences
- Kazu Sagashi Puzzles from Naoki Inaba
- Factor Tree Puzzles Inspired by Dr. Harold Reiter
- Strimko Logic Puzzles Review
- Tents and Trees Puzzles
- Slants Puzzles
- Angle Mazes by Naoki Inaba
- Zukei Puzzles
- Japanese Logic Puzzles for the Secondary Math Classroom
- Area Maze Puzzles from Naoki Inaba
- Masyu Puzzles
- KenKen In The Classroom
- Futoshiki Puzzles
- Hashi Puzzles
- Shikaku Puzzles
- Nonogram Puzzles
- Digit Cells Puzzle