Does anyone know how to open these doors?

[crude bloom]

There’s a field guide page you find in the castle which allocate each image a number and you solve the equation using that

[viscid fable]

Thank you!

[pine bison]

No all you do is count from 0 - 10 on the door frame

And each creature is worth the value of the position it comes in order of on the frame starting at 0

[serene yacht]

There is a chalk board somewhere in the castle with some animals. You then have to do some math