I've been looking at forums that provide links to prep for trading interviews and TraderTest.org always pops up however, the website is down. Does anyone know what happened to the website or what are alternatives? I don't just want the mental math part, I also want to be able to answer the probability and brainteaser questions in an interview
I use https://graduatetrader.com/ they have 50 maths tests, each 8 mins long with 80 questions and negative marking. You can also make a profile to log your results.
zetamac is one, if you found others I am interested to know!
There is a similar site.
Check this out:
when I was interviewing for flow traders their HR recommended practice source http://www.calculationrankings.com/
http://tradermaths.com has the same scoring method as Optiver and the questions are customizable.
I've built https://mentalmath.online/ as an alternative - it focuses specifically on problems you'll likely face during trading interviews.