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@donkulator there is a thing called матановая капча, literally “calculus captcha”. Russians use it on some tech and engineering-oriented websites.
Here's a translated version of an article about it: https://translated.turbopages.org/p...
(“Matan” here means calculus) -
@kiki I like the fact that most of them seem to rely on the user knowing a shortcut that makes most of the terms disappear, so getting past them requires constructive laziness.
Is there a time limit though? You can't be letting in people who get the right answer by doing a spreadsheet. -
@donkulator those who can realize a spreadsheet approach can solve it deserve to pass.
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@kiki Not sure about that. Some of the examples are stuff like what is the limit of (2x^5+5x^3-3x^2)/(x^5-7x^2) as x tends to infinity.
There are two acceptable solutions to that: "2 by inspection" and "I don't understand". If they know enough maths to work it out but they feel the need to do it laboriously, they're dangerous.
A fun fact about Yuri Gagarin's flight:
Before the flight, it was not yet known how the human psyche would behave in space, so a special protection was provided to prevent the first cosmonaut from trying to control the ship's flight or damage the equipment in a fit of madness. To enable manual control, he had to open a sealed envelope, inside which lay a sheet with a mathematical problem, the solution of which gave the code for unlocking the control panel.
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