How to open riddle doors!

In this Guide I explain how to open the Riddle doors, and walk you through the first one.

The Code:

This is the Code Page you need in order to open all these doors. Alternatively you can simply count the symbols around the door.

Where you find this code:

Go to this location on the Map. It is from Central Hall up the stair case that twists into two, then up one flight of the spiral staircase and over the wooden floor. Take the first turn to the right and you find a chest that has this code inside of it.

Now to the Math:

Here you see the symbols that appear on these doors.
The top triangle refers to the dice on the left, the lower one to the dice on the right side of the door.
The number in the middle of each triangle is the sum of the three circles surrounding it. The animals stand for the numbers according to the Code on the first picture. Alternatively you can follow the animals around the door frame starting at the bottom left and starting with 0.

So the first triangle contains the number 9. The circles contain the Number 2, a Hydra which according to the code represents the Number 3 and a ?.
Simple calculate 9 = 2+3+x
Or otherwise: 9 - 2 - 3 = 4
According to the Code 4 is the Owl.

The Owl:

Roll the left dice to Owl:

Back to the Math:

Now for the lower triangle and the right dice:
4 = 0 + 1 + x or
4 - 0 - 1 = 3

Three stands for the Hydra.

The Hydra:

Roll the right dice to the Hydra.

Open the door

When you look at the door now, it shall say F to open. Press F

Arithmancy

Now you unlocked the Arithmancy classroom!

More doors

Inside the Arithmancy classroom are 2 more riddle doors, as well as all over Hogwarts!
I hope my Guide helped you understand how to open them!
Happy calculating :D

[Egghead_25]

i dont wanna open them

[Parry Hotter]

Unfortunately, I got in the habit of just flipping through all the combos since most of the doors have one panel near it. I never bothered to try and decipher it. It actually doesn't take much time to do it that way. If they move the panels much farther away from the door then I'd probably solve it properly.

[Magicalmarrow01]

I've literally guessed the numbers because the rolls are only a few set numbers in each spot

[Anomalocaris729]

@nogghan I'm doing that for all of them too you're not alone.

[S.E.C.]

You don't Need to guess though, from the left bottom its 0 to 9, even if you don't have the page, the door will still list the symbols in the exact same order. IF you have to guess, you're not paying attention.

[frotchmasteh]

also each creature roughly has the amount of appendages etc relevant to its number. unicorn 1 horn.hydra 3 heads. spider thing 5 legs stuff like that

[nogghan]

am i the only one who speed ran them by just changing one at a time til the door opened?

[The Green Gobbler]

It took me a while to find the code page. If you don't find it ingame, or don't want to take time to do the arithmetic, the riddles are also easy to brute force. (2 symbols per door, usually 5 choices in each slot)Follow the guessing pattern like this:

11
21
31
41
51
12
22
32
42
52
13
23
33
43
53
14
24
34
44
54
15
25
35
45
55

Give or take 25 guesses to get the riddle.

[Khelder]

3 stands for the Runespoor (a snake with 3 heads). 9 stands for the Hydra (9 heads)

[Norinia]

I died inside when I saw this puzzle and remembered a certain Cyberchase episode.