#### Matt Parker measures the Earth

This is inspired by a very nice and entertaining Video on the Stand-Up-Math channel featuring Matt Parker and Hannah from NumberPhile. They aimed to repeat an experiment from a book…

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# Uncategorized

#### Matt Parker measures the Earth

#### What does a Mirror Flip?

#### Paradoxes in Probability Theory

#### Logical Flaws

#### Pisa-Unsinn

#### The „Sleeping Beauty“ Paradox

#### A Little bit of Duplo-Mathematics

#### „Restricted Choice“ in Bridge

#### The Two Envelopes Problem

#### Another nice Math Problem

This is inspired by a very nice and entertaining Video on the Stand-Up-Math channel featuring Matt Parker and Hannah from NumberPhile. They aimed to repeat an experiment from a book…

I recently was asked a question about mirrors which has been asked a million times before: Why does a mirror flip the left and right side of a face, but…

Probability theory is always a more difficult topic than it seems at first sight. In another posting, I talked about the „two envelopes problem“ and described my basic approach to…

The following is the Wason Selection Task, as cited by Wikipedia. „You are shown a set of four cards placed on a table, each of which has a number on…

Ich finde immer wieder Pisa-Aufgaben im Netz, die schlecht formuliert sind. Ich hoffe mal, dass die zitierten Aufgaben nicht wirklich die Aufgaben sind, die gestellt wurden. Aber immerhin habe ich…

I learned about this problem from a video of „Veritasium“. The story goes like this: A beauty falls asleep. Then a coin is flipped. On each wake up, the beauty…

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…