The Texas A&M University CTF (ctftime.org) ran for over one week from 17/02/2018, 00:00 UTC to 26/02/2018 00:00 UTC. There have been a lot of challenges starting at a very easy difficulty.
I did the five pwn challenges ranging from 25 to 200 points:
–> pwn1 (25 pts)
–> pwn2 (50 pts)
–> pwn3 (75 pts)
–> pwn4 (125 pts)
–> pwn5 (200 pts)