Maybe for 1st April I will turn all the spreadsheets at work into Greek numerals

In modern Greek we use them mostly as ordinal numbers, in all places, like school grades (1st grade = α' τάξη, 6th grade = στ' τάξη, etc), test marks under ε' grade (as u do abroad, but them we stop), in kings and queens (the most important reason to learn them as a modern Greek learner) (ex. Constantine XI = ΙΑ' and Louis XVI = Λουδοβίκος ΙΣΤ'), generally when you want to categorize things and for many many other stuff.

In modern Greece we usually use ς' or στ' for 6

π = 3.14...

In modern Greece we have a cool symbiosis, where we use Arabic numerals for maths and statistics, but Greek numerals for lists or titles or names. For example the 5th class at school is E class, Constantine the 11th is "Κωνσταντίνος ΙΑ'", and WW2 IS Β'ΠΠ (Β' Παγκόσμιος Πόλεμος)

I stumbled upon them as chapter numbers in modern Greek, and I was super confused when the eleventh chapter was ια' instead of continuing with κ' now it's a lot more logical then I thought!

I'm half Finnish on my mother's side so the sampo references weren't lost on me.

I learned the greek numerals this spring, and I agree —they are WAY better than Roman ones!

Σε ευχαριστώ για το πάθος σου και τις άψογες επεξηγήσεις σου!!!!

We still use this kind of numerals with dynasty names, f.ex. Ιωάννης Α' = John I, Κωνσταντίνος ΙΑ' = Constantine XI.

Αυτός ο άνθρωπος φαίνεται τόσο ευγενής, μορφωμένος και παθιασμένος με το αντικείμενό του. Θα ήθελα να τον είχα δάσκαλο.

I feel like this would take at least a few weeks of practice to not forget it tomorrow morning

One thing gets confusing when dealing with numbers in the hundreds, such as Psalms, in Greek and Hebrew side-by-side: 100 is ρ in Greek, but ק in Hebrew. The reason is that Greek has no letter corresponding to צ.

Nice one on the digamma. I always thought it was actually stigma and often wondered why it wasn't digamma.

A very similar system is used in Hebrew as well.

8:57 A fun mnemonic I thought of: