• thelasttoot@lemmy.world
    link
    fedilink
    English
    arrow-up
    5
    arrow-down
    3
    ·
    28 days ago

    It’s because it’s stupid. The bottom answer is at least sort of similar to a simple rule for adding 9s. But the op is just so incredibly specific that it won’t help most of the time.

    • Rekorse@sh.itjust.works
      link
      fedilink
      English
      arrow-up
      2
      ·
      27 days ago

      Well the OP is a joke form of a more serious example. Its meant to illustrate the point but not actually require much thought or calculation.