#### A Little bit of Duplo-Mathematics

This construction works without stretching or bending. Everything is sitting exactly on the studs. Here is a mathematical abstraction of the situation. This has been observed by a friend who…

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#### A Little bit of Duplo-Mathematics

#### „Restricted Choice“ in Bridge

#### The Two Envelopes Problem

#### Another nice Math Problem

#### ChatGPB Babble

#### Restart

This construction works without stretching or bending. Everything is sitting exactly on the studs. Here is a mathematical abstraction of the situation. This has been observed by a friend who…

The 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…

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…

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…

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…

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…