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[–] 5 points 4 months ago (2 children)

You know what fucks me up is that 21 has a "nine-ness" quality to it now that sometimes makes me mess up real math.

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  • [–] 3 points 4 months ago* (1 child)

    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 moved to an Islamic country where Friday is the holy day, not Sunday. So the weekends were Thursday-Friday and not Saturday-Sunday.

    What 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.

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  • [–] 2 points 4 months ago*

    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.
    sorry bookkeepers i just gave away your trade secret. the one.

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