Among the numerous means of transportation that appear in recreational mathematics problems, elevators could not be missing.
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Some very important numbers are known and accessible, such as π oe, but others, such as Chaitin's constant, are ignored and difficult to understand by non-mathematicians.
Here are some candidates to add to the list of the most interesting numbers
All numbers are interesting, but some are interesting in a very special way.
Pappus of Alexandria formulated important geometric theorems and studied the Platonic solids in relation to the sphere
Depending on certain configurations, planting trees is a classic brain teaser topic.
Many logical enigmas belong to oral tradition and their origin is not known, but others are the work of prestigious authors.
It is easy to take events that are actually quite probable as amazing coincidences.
There are coincidences that do not seem so and apparent coincidences due to unclear causes.
Jokes are closely related to riddles, lateral thinking and the eureka phenomenon.