Perfect Square Hidoku Puzzles
Can you solve these perfect square hidoku puzzles by filling in the missing numbers?
I originally created this puzzle worksheet in 2025 to celebrate Perfect Square Day on 9/16/25. Since it was quite popular, I decided to reformat it so it can be used any day of the year!
What are Hidoku Puzzles?
Hidoku Puzzles (originally published as Hidato Puzzles) are the creation of Dr. Gyora M. Benedek, an Israeli mathematician. The Hebrew word “hida” means riddle. In a hidoku puzzle, you are given a grid with a selection of the numbers already filled in.
Your task is to fill in the missing numbers so that each number connects to the next number either horizontally, vertically, or diagonally. 1 must connect to 2, 2 must connect to 3, and so on.
When I use Hidoku Puzzles with students, I often have them draw in the lines between the numbers in order to help them check their solutions.
Perfect Square Hidoku Puzzle Instructions
Fill in the missing numbers in each square grid so that each number connects to the next number either horizontally, vertically, or diagonally.
For these specific puzzles, students are arranging the numbers from 1 to 9 in the first square-shaped grid, 1 to 16 in the second square-shaped grid, and 1 to 25 in the third square-shaped grid. In each grid, consecutive numbers should touch either horizontally, vertically, or diagonally.
You could definitely think of this puzzle as making a “chain of numbers.”
Four Levels of Puzzles and Printing Options
These Perfect Square hidoku puzzles are available in four different levels: Easy, Medium, Hard, and Challenging.
As the levels progress, you are given fewer and fewer numbers on the grid to begin with. This means that much more logic is required to solve the puzzle.
Perfect Square Hidoku Puzzle Files
These Perfect Square hidoku puzzles are available as a PDF or as an editable PowerPoint file.
Click here to SAVE the file to your device.
Perfect Square Hidoku Puzzles (PDF)
0 saves – 151.70 KB
Editable Powerpoint Files in ZIP Folder
Puzzle Solutions
Puzzle solutions are available on a password-protected solution page. I do not openly post the puzzle answer keys because one of my goals as a resource creator is to craft learning experiences for students that are non-google-able. I want teachers to be able to use these puzzles in their classrooms without the solutions being found easily on the Internet.
Please email me at sarah@mathequalslove.net for the password to the answer key database featuring all of my printable puzzles and math worksheets. I frequently have students emailing me for the answer key, so please specify in your email what school you teach at and what subjects you teach. If you do not provide these details, I will not be able to send you the password.
Not a teacher? Go ahead and send me an email as well. Just let me know what you are using the puzzles for. I am continually in awe of how many people are using these puzzles with scouting groups, with senior adults battling dementia, or as fun activities in their workplace. Just give me enough details so I know you are not a student looking for answers to the puzzle that was assigned as their homework!
Similar Resources
This puzzle is just one of many printable hidoku logic puzzles that I have created for my own classroom and am sharing with you!
Be sure to check out my entire collection of free printable logic puzzles.
Looking for more perfect square activities and puzzles for your classroom? Here’s just a few examples of the other activities and resources I have created featuring perfect squares.
