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Wie man im Kopf eine Münze für >Kopf oder Zahl< wirft

Wie kann man ohne Hilfsmittel eine Zufallszahl, sei es nur gerade/ungerade, generieren?

I love the book Mindhacker: 60 Tips, Tricks, and Games to Take Your Mind to the Next Level, by Ron and Marty Hale-Evans. One of the tips is how to generate pseudorandom numbers in your head. Say you want to flip a coin, but you don’t have one. Just think of a short word, and add up the letter values (a=1, b=2 … z=26). If the sum is even, it’s „heads,“ if it’s odd, it’s „tails.“
The book also shows you how to mentally roll a 6-sided or 10-sided die.

https://www.amazon.com/Mindhacker-Tips-Tricks-Games-Level-ebook/dp/B005LGUMKQ/ref=as_li_ss_tl?ie=UTF8&qid=1549307222&sr=8-1&keywords=mindhacker&linkCode=sl1&tag=boingboing&linkId=79b93a4f3f95e88d992c709c6be58ae4&language=en_US

(via BoingBoing)