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Blog  |   Puzzles  |   Books  |   About  |    🔍 
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Blog  |   Puzzles  |   Books  |   About  |    🔍 

2024-December 🎄 Merry Christmas! 🎅

Kaleidoscope Logic Puzzles is my first variety slitherlink book, and my most beautiful book to-date. It is spiral-bound, and contains 124 puzzles, including both classic and variety Slitherlink puzzles. Lots of unique full-page tessellations that I have not published elsewhere. If you are new to Slitherlink, you'll appreciate the tutorials which cover both classic and non-square-grid Slitherlink puzzles. Enjoy!



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Free Calcudoku Puzzles

Here are hundreds of free Calcudoku puzzles suitable for printing. Inkies have the same rules as the famous puzzles created by Tetsuya Miyamoto. They are various called KenKen®, Calcudoku, Mathdoku, and Web Kendoku. Each Inky puzzle has only one unique solution.

The Beginner puzzles listed below use only addition and subtraction, and are a good math activity for kids.

If you're an advanced solver looking for a tough new challenge, check out my Krypto Inkies!


Don't see the format you prefer? Run out of puzzles? Let me know!

Instructions

Fill in the blank squares so that each row and each column contain all of the digits 1 thru 4 (or whatever the size of the puzzle is).

The heavy lines indicate areas (called cages) that contain groups of numbers that can be combined (in any order) to produce the result shown in the cage, with the indicated math operation. For example, 8× means you can multiply the values together to produce 8.

Note that I use a slash (/) to indicate division instead of the traditional symbol (÷) to avoid confusion with the plus sign (+).

Numbers in cages may repeat, as long as they are not in the same row or column.

Take a look at the answers page if you get stuck!

Thanks to Simon Tatham, whose code formed the starting point for this collection.

All puzzles ©2005-2024 KrazyDad.com. Feel free to reproduce the puzzles for personal, church, school, hospital or institutional use. Please do not use my puzzles in for-profit publications without my permission. If you need free puzzles for your small circulation newspaper, or you would like to purchase puzzles for a book, periodical, app or website, contact me at dad@krazydad.com.

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