It's not really numerology though. Yes it's a dumb trick with base-10 math but that doesn't make it numerology. It's not trying to draw any connections between otherwise unrelated things. I think of numerology as trying to use stupid-glue to connect things that aren't connected. Like, I was born on the 8th day of the 2nd month, 8 - 2 is 6, the sixth planet is Saturn which also has 6 letters, and Jeffrey Epstein's first pet fish was named Saturn! OMG! That's numerology.

Numerology is far stupider than this admittedly useless arithmetic game.