oh that’s easy. all multiples of three, you add their digits and the digits add up to three.
also if you’ve made a transposition error (179 instead of 197) you will be off by a multiple of 9.
Comment on America
petrol_sniff_king@lemmy.blahaj.zone 1 day agoYou know what fucks me up is that 21 has a “nine-ness” quality to it now that sometimes makes me mess up real math.
HeyThisIsntTheYMCA@lemmy.world 1 day ago
stickyprimer@lemmy.world 1 day ago
Hah I can believe that.
I’m not technically synaestehtic but I do have strong associations between numbers and colors, days of the week and colors.
Saturday has always been blue. Sunday is red. Number 4 is green, 3 is yellow, etc.
For a time I lived in an Islamic country where Friday is the holy day, not Sunday. So the weekends were Thursday-Friday and not Saturday-Sunday.
Was weird is that my red/blue associations with Saturday/Sunday shifted onto Thursday/Friday after a long time of living like this. And then I left that place and my associations shifted back.
The “nineness” of a thing, as you say, is hard to describe.
petrol_sniff_king@lemmy.blahaj.zone 1 day ago
Do you think the sat/blue sun/red thing comes from calendars? I don’t think about it often, but I do think there is a “redness” to sunday.