Knowledge: Arab countries write differently style as it starts from ride to left. On the other hand, German labels number 7 upside side to have more luck.

Conversation:
7 has always been my favorite number. It's very lucky for me.
Seven is the natural number between 6 and 8.
Yes, I know. It is also an interesting number (7 deadly sins, etc) and can be known to be a lucky number.
Various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J but vertically inverted.
That is interesting! What other countries write number 7 differently?

Response: Oh yeah, I heard Germany writes it differently, write number 7 upside down to have more luck.