„Restricted Choice“ in Bridge
adminThe principle of "restricted choice" in the card game Bridge made it to Wikipedia. The article is somewhat mysterious, however, and obscures what is really happening. I never infer with…
The Two Envelopes Problem
This problem is at least half a century old, and most likely a lot older. It can be found in a 1953 book by Maurice Kraitchik which is the oldest…
Another nice Math Problem
Published in the old blog in 1022/08/16 I recently got recommended a YouTube video by MindYourDecisions with the following problem: Which number doubles when the last digit becomes the first…
ChatGPB Babble
I asked ChatGPT to give a proof of the Theorem of Pythagoras. Here is what it came up with. The Pythagorean Theorem states that in a right triangle, the square…
Restart
This is a restart of my old blog about mathematics. The reasons for the restart were that on Strato the old installation did not support PHP 8.0 and Strato does…