Isabella, my GF has an enquiring mind as you know and therefore this post is from her.
As you can smell numbers and also smell colours , what happens if the number has a different colour , is it a fusion smell or a new smell entirely i.e Red smells like bananas , 9 smells like custard , would a red 9 smell like bananas and custard?
Do only visual numbers smell or do vocal numbers (spoken numbers) smell too and if vocal numbers smell does it matter who says the number i.e Ferris saying 9 smells like ferret s**t . MissLizard saying 9 smells like burnt toast.
_________________
Another man's freedom fighter, one man's terrorist is - Yoda (probably)