ITP Puzzles

So at ITP, it all started when Michael Colombo posted an email to the list about an as-yet unsolved puzzle that he left up on his locker.  He had a cardboard cutout taped to the door of his locker.  Here is a similar image of it from the web:

This led me to start posting my own puzzles on my locker.  Can you figure them out?  There are two on this photo (don’t count the “READING IS SEXY” sticker):

And the most recent one here:

Email me if you think you solved any of them.