Updated: 2024-07-29 16:01:40
The puzzle In the Details by Derek Kisman is one of my favorite MIT Mystery Hunt puzzles of all times. I even wrote a blog post advertising it and another post with comments on the solution. This puzzle type became known as fractal word search. In the standard word search, you have a grid of […]
Updated: 2024-07-27 18:21:12
The fine tenacious boys nicely joke to hated servant girls sick for (absent) king. The picture shows John Conway’s notes in my journal. They are the mnemonic for setting up his trick. For example, the word “tenacious” sounds similar to “ten” and “ace”. Hence, we arrange 13 cards in this order: 3, 5, 10, A, […]
Updated: 2024-07-24 16:44:47
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Updated: 2024-07-19 20:50:04
Recent Facebook Puzzle from Denis Afrisonov. Puzzle. 100 students took a test where each was asked the same question: “How many out of 100 students will get a ‘pass’ grade after the test?” Each student must reply with an integer. Immediately after each answer, the teacher announced whether the current student passed or failed based […]
Updated: 2024-07-12 16:40:08
(A small piece I wrote on Dec 29, 2009. Edited in 2024.) They were black, very comfy, and felt like a second skin. The shoes had this shock-absorbing cushioning, so asphalt felt like carpet. I had them for 10 years. They served me for so long that I started believing our happy relationship would last […]
Updated: 2024-07-11 20:57:39
I recently posted a symmetry puzzle from Donald Bell. He just sent me another one. Puzzle. Start with a 30-60-90 triangle (half of an equilateral triangle). Divide it into two 30-60-90 triangles of different sizes by dropping a perpendicular from the right-angled corner to the opposite side. Put the resulting two pieces together to form […]
Updated: 2024-07-05 23:57:58
Usually, I only post puzzles to which I know the solution. However, I don’t know the solution to this exciting geometry question from Facebook, yet. But I like the puzzle so much that I’d rather post it than wait until I find time to think about it. Puzzle. A centrally-symmetric figure is cut into two […]
