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.
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.
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.