In this post, I’ll teach you how to solve the “Math doors” that are around the castle. The first thing you’re going to want to find is the “cheat sheet” that can be found outside of the Arithmancy Classroom, which is down the hall in the rafter section from the Divination Fast Travel spot. There you will find this in a box on the bench to the right of the chalkboard.
The beasts number 0-9, not 1-8, so keep that in mind. Below I’ll show the math for each door as well as provide a link to the video for each one.