One of the things I’ve most liked about introducing my students to new logic puzzles is that they’ve been new to me as well! I was initially hesitant to try the hashiwokakero puzzles with my students because they sounded scary. I learned about these puzzles from reading the slides from Jeffrey Wanko’s NCTM presentation. You can check out the slides from his various presentations on using logic puzzles in the math classroom on his website.
My kids preferred calling these “Bridge” puzzles. And, I’m totally okay with that. Though, I find myself thinking of them as “Hashi” puzzles.
I put puzzle A from this document on the SMARTBoard for us to solve together as a class. After working through it together with a few bumps along the way, I gave students their own two puzzles to solve. (Puzzles B and C from the previously linked document).
Here are the rules for hashi puzzles:
• The bridges must begin and end at islands, traveling in a straight line (horizontally or
• The bridges must not cross any other bridges or islands
• No more than two bridges can connect a pair of islands
• The total number of bridges connected to each island must match the number on that
Several students decided these were their favorite logic puzzles yet.
I let one of my classes vote one day as to which puzzle they would like a chance to do again, and these puzzles were a huge winner by a landslide.
More Printable Paper and Pencil Logic Puzzles
- 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