A locked door covered in strange symbols stands between you and valuable loot at Hogwarts. Solving these Arithmancy puzzles means decoding a clever mix of numbers, creatures, and logic that tests more than just your spellcasting skills.
When you try to open the door, two triangles appear on the door face. Some have numbers, some corners have a picture of a beast, and the last corner has a question mark. Continue reading to find out what beasts should take over the last corner, and how to solve these Arithmancy door puzzles in Hogwarts Legacy – including the locked door you’ll find in the Central Hall.
How to solve Arithmancy door puzzles in Hogwarts Legacy
Examine the symbols around each Arithmancy door, where beasts represent numbers from 0 to 9 based on their features: Demiguise is 0, Unicorn 1, Graphorn 2, Runespoor 3, Fwooper 4, Quintaped 5, Salamander 6, Acromantula 8, and Hydra 9. For the two triangles, add the bottom left number or symbol value to the bottom right one, then subtract that sum from the top number to get the result for each dial. Turn the left dial to match the top triangle’s required beast and the right dial for the bottom triangle, then interact to open the door.
The arithmancy door puzzle in Hogwarts Legacy can be solved by solving a math problem. Each of the magical beasts around the door is associated with a number, and you can guess the number based on the images themselves.
For example, the unicorn having one horn is one, and the spider has eight legs so it is eight. However, the trickiest part that seems to stump many players is that thenumbers start from zero.
To unlock the puzzle door, you’ll have to find the two missing numbers in their triangles. Simply add the two numbers together and subtract the sum from the number in the center of the triangle. The resulting number will be associated with a magical beast that you’ll have to input into triangles around the door. If you’re unsure of what number the magical beasts represent, check the image below to see what magical beasts are associated with what number.
Central Hall door puzzle solution in Hogwarts Legacy
In Central Hall near the Potions Classroom Floo Flame, interact with the door to reveal two triangular equations where beast symbols match numbers from 0-9 along the bottom arch, starting at 0 from the left. For the top triangle, set the single question mark to the spider symbol representing 8, as 11 plus elephant (2) equals 21 when added to it; roll the nearby basin beside the door to that position. For the bottom triangle, set the double question marks to the three-headed snake (hydra) symbol for 3, since headcrab (5) plus killer bacteria (9) totals 17; roll the basin on the upper landing to match.
If you’re still having trouble unlocking the door puzzles, follow along an example of an arithmancy door puzzle that can be found in the Central Hall.
- Reveal the triangles on the door by interacting with it.
- Add the two numbers on the corners of the triangle together. In the case of the image above, it would be 11 2 = 13 for the top triangle and 5 9 = 14 for the bottom triangle.
- Subtract the number inside the triangle by the sum of the two numbers from the step before. In this case, it would be 21 – 13 = 8 for the top triangle and 17 – 14 = 3 for the bottom triangle.
- Find the magical beast associated with those numbers, which is the spider for the top triangle and the three-headed snake.
- Search for nearby triangles on the wall that are labeled with “?” and “??”. If you’re having a hard time finding the triangles, use revelio near the Arithmancy door, and look around to see highlighted triangles on the wall.
- Input the magical beasts from step four on their respective triangles. For the image above, the triangle with a “?” would be the spider and the triangle with a “??” would be the three-headed snake.
- Interact with the door again to unlock it, and open the chests inside to collect your rewards.
Now you’ve mastered these doors, other obstacles we can help with are eye chests, picking locks with Alohomora, and finding all of the Demiguise statues.
On numerous occasions in recent years, billionaire and Harry Potter creator J.K. Rowling has taken public stances against inclusive transgender laws and trans rights, and has written fiction that has been condemned by LGBTQ organizations for its use of harmful anti-trans tropes. Hate crimes, as well as legislation that denies the rights of trans people, have become more prevalent in the U.K. since 2019, and, more recently, in the United States as well.
According to an FAQ from Hogwarts Legacy publisher Warner Bros. Interactive – the parent company of Avalanche Software, the game’s developer – Rowling is “not directly involved” with the creation of Hogwarts Legacy. Regardless, the sales and widespread attention generated by a AAA video game will benefit Rowling, and that has led some fans to decide not to buy the game. For a more in-depth explainer of the yearslong controversy leading up to Hogwarts Legacy‘s release, read AELGAMES’s breakdown.
All Arithmancy door locations in Hogwarts castle
Hogwarts Legacy features 12 Arithmancy door puzzles scattered throughout Hogwarts castle, primarily in the Library Annex and surrounding areas. These doors require solving math equations with creature symbols representing numbers 0-9, and they’re accessible after early-game progression.
Complete Door Locations
Use nearby Floo Flames for fast travel. Here’s a table listing all 12 doors with precise spots:
| # | Door Location | Nearest Floo Flame |
|---|---|---|
| Rafters near Divination Classroom | Divination Classroom | |
| Arithmancy Classroom entrance | Divination Classroom | |
| Inside Arithmancy Classroom (Door 1) | Divination Classroom | |
| Troll room next to Library | Library | |
| Hall across from Potions Classroom | Potions Classroom | |
| Great Hall hallway | Great Hall | |
| North Hall (cobweb hallway) | Transfiguration Classroom | |
| Outside Charms Classroom | Charms Classroom | |
| Ravenclaw Tower hallway | Ravenclaw Tower | |
| Grand Staircase Tower | Grand Staircase Tower | |
| Lower Grand Staircase | Lower Grand Staircase | |
| Prefect Tower (requires stealth) | (Access via upper levels) |
Navigation Tip: Start at Divination Classroom Floo for the first cluster (Doors 1-3), which also holds the Arithmancy Study Guide for symbol values. Explore clockwise from there to hit most others efficiently.
Detailed map of all Arithmancy door locations in Hogwarts Legacy
Hogwarts Legacy has 12 Arithmancy door puzzles within Hogwarts castle, no single official interactive map exists in-game, but fan guides and wikis compile detailed textual maps with Floo Flame references and zone breakdowns.
Zone-Based Locations
Doors cluster in key areas like the Library Annex (first 3 doors). Here’s a grouped table from reliable walkthroughs:
| Zone/Area | Doors (#) | Nearest Floo & Directions |
|---|---|---|
| Library Annex | Rafters (1), Arithmancy Classroom entrance (2), Inside classroom (3) | Divination Classroom: Turn around, rafters right; through Door 1 for 2-3. |
| Central Hall | Entrance to Transfiguration Courtyard (Central Hall door) | Central Hall: Lowest southern level. |
| South Wing/Faculty | Second floor Faculty Tower | Faculty Tower Floo: Up to second floor. |
| Dark Arts Tower | Fifth floor near Charms | Charms Classroom: Fifth floor Dark Arts area. |
| Great Hall | NE base level hallway | Great Hall: Left from Floo into small hall. |
| Potions Classroom | Hall across (5), Second nearby | Potions Classroom: Turn around into hall. |
| Charms Classroom | Outside left corner (8) | Charms Classroom: Turn around, left corner. |
| North Hall | Fourth floor top (cobwebs) | Transfiguration Classroom: Up to fourth floor. |
| Ravenclaw Tower | Base level hallway end | Ravenclaw Tower: Before spiral stairs. |
| Grand Staircase | Lower stairs (11), Tower stairs (10) | Grand Staircase/Lower: Down short stairs; Tower: Down from Floo. |
| Long Gallery | Near Bell Tower exit | Long Gallery Floo: Toward exit. |
| Prefect Tower | Upper level (stealth) | Upper levels: Use Disillusionment; avoid detection. |
Visual Guide References
Video walkthroughs provide timestamped tours mimicking maps: e.g., YouTube guide starts Central Hall (0:44), Divination cluster (1:15), covering all via Floo routes. Game-maps.com offers static in-game overlays per zone for precise navigation. Start at Divination for the symbol guide note, then spiral outward.
