Are there sites where it is possible to solve math problems and earn money?

Question

Mathematics

Are there sites where it is possible to solve math problems and earn money? At the same time:
1. There are no education requirements (only bank card details are indicated from the contact details, and in case of emergency - full name and / or phone number)
2. The person does not work for someone (does not bear responsibility for someone) , but simply enters contact details and solves tasks (as on Coursera) - and when tasks are completed, money is transferred to a person.
That is, he does not send D / Z, test papers, diplomas, etc., but simply solves tests (does not work for people), and moderators (or the system) charge him money

Answer 1

To check the correctness of a solution, this solution must be known in advance. So hardly anyone will pay for well-known solutions.
There are machine learning competitions . Not all available data is provided there, but most of it, e.g. 95%. Contestants train models, which are then tested on the "secret" remaining data. The winner is the one that showed itself better than others on closed data. But this is not purely mathematics, although it is very close.
You can also work as a tutor and train someone in mathematics (remotely).
However, there are competitions with prizes. Here is a question from 2014 .