Challenges in Alex CTF seemed easier than the ones in some of the other CTFs I have seen and the 3 days to complete them was pretty generous. That’s the best way of doing it, I think - when stress is lower you can think more creatively and come up with higher quality solutions.

Some challenges were very simple - you could find the flag by doing a search. Here are the ones that seemed more interesting:

C++ is awesome

Catalyst system

unVM me

Ultracoded

Many time secrets

What is this encryption?

Poor RSA

Math bot