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10 Jul 2026 1 minute read 0 comments Joe Bou Khalil
Puzzles are great training for the mind. I know I always say that. But creating new puzzles is always also a training for the mind. How to make a puzzle Imagine like creating a book or story or even writing an article, but it's puzzle creation; it...
20 Jun 2026 1 minute read 0 comments Joe Bou Khalil
This is a simple fun illusion that lets you try to see the number. It's called Moiré-Magic. It's fun and could be a good time to spend with friends guessing who sees it first. What is Moiré-Magic? It's a combination of overlapping patterns, for e...
10 Jun 2026 1 minute read 13 comments Joe Bou Khalil
I've been thinking of this math problem for days and wanting to share it. So finally I decided to do it. Here it is. The problem: A chicken wants to cross the road. Her speed is 2.5 meters per minute. And the road from side to side is 1.8 meters...
2 Jun 2026 1 minute read 0 comments Joe Bou Khalil
Puzzles are great for our brains, for our mental health, and even for fun. Trying new puzzles can make us think outside of the box. And even improve our problem-solving skills. Benefits of puzzles Improved way of thinking. Improved problem-solvi...
24 Mar 2026 1 minute read 0 comments Joe Bou Khalil
Introduction Puzzles are not just for fun. They could help in many ways when you try to solve them. They could be a fun time with friends, not to mention the benefits for the brain. Benefits of puzzles Very good for a healthy mind. Fun time wit...
24 Sep 2025 2 minute read 1 comment Joe Bou Khalil
Encryption is everywhere in our lives, from WhatsApp chats to online banking. But what if you wanted to learn the logic of encryption without a computer? The old style with paper and pen. You can do that with a fun puzzle system that mixes numbers an...
17 Jun 2025 2 minute read 2 comments ☑️0🆇D̺͈͙͕̿ͧ̑ͣ🅰🆅🅸🅳eͤ
Have you ever heard of the puzzle "The Legend of Satoshi Nakamoto"? A contest published in 2015 that hid a Bitcoin private key containing 4.87 BTC (about 500k at today's exchange rate). The puzzle was created by cryptographer Marguerite deCourcelle i...
1 Dec 2022 6 minute read 4 comments Great White Snark
Recently, one of my relatives has retired. In order to keep her mind active and sharp, she aims to play puzzle and strategy games. Knowing that I play a number of them, she's asked me to list some, with brief descriptions for each. Here, then, in alp...
23 Jul 2020 1 minute read 3 comments orbithunter
It's time for us to try solving the logic problem. You can take a look at the illustration below to help you solve the problem. Here is the scenario: Four criminals are caught and are to be punished. The judge allows them to be freed if they can so...
10 Mar 2020 6 minute read 1 comment GGori
By Giuseppe Gori © This article can be copied, with attribution. The “Fruit of Life” is the name given to a geometrical figure of 13 circles assembled along the three main directions at 60 degrees angles, thus creating a composite structure analogous...
