The first one was hard imho because it was a multistep process. You had to watch a video, decrypt the words, plug it into a Pascal's Triangle, and then descramble the words. The next two challenges were just overlaying a graphic on top of letters. (Well, alright, you had to use a graphics editing program to tilt some shapes and fit it onto a board, but there was only one way it could all fit, so it's like half a step).