
LeetCode
Exercism
Codewars
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CodeSignal
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Project Euler is a series of challenging mathematical/computer programming problems that will...

Xmind
Miro
MindMeister
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Whimsical
Brainfo
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No more hunting through files and folders, Constella surfaces related notes as you type on a visual canvas. Capture and connect thoughts quickly to build knowledge across life. For brainstorming or generating content, chat & work alongside Stella.

Which is more popular?
Based on our record, Project Euler seems to be more popular. It has been mentioned 415 times since March 2021.
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Project Euler Challenges 1–4 - Coding Challenges with Florin
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Project Euler provides a large collection of challenges in the domain of computer science and mathematics. The challenges typically involve writing a small program to figure out the solution to a clever mathematical...
If you are studying algorithms and computer programming, chances are you’ve heard of Project Euler. A collection of mathematical problems made for problem solvers who are interested to combine mathematics and...
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Recommendations tracked on public social media and blogs since March 2021.


Let's hope this is going to help me solve some more Project Euler [1] problems! [1] https://projecteuler.net/. - Source: Hacker News / 5 months ago
Https://projecteuler.net/ for "Thinker" brain food. (it still has the issue of not being a pragmatic use of time, but there are plenty interesting enough questions which it at least helps). - Source: Hacker News / 8 months ago
I have a Project Euler (https://projecteuler.net/) account. Though I do not register at all on the leader board I will sometimes work obsessively on a problem just to make one of the level icons light up for me. There is not really... - Source: Hacker News / 10 months ago
Tracking Constella since Feb 2025.
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