• thelasttoot@lemmy.world
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    2 months 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
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      2 months 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.