Yes, it’s from a book called “Uncle John’s Bathroom Reader” and that book was resting on a closed toilet seat in a nation that only kind of uses the metric system in certain situations… however, you’d be surprised how much you can learn after a single visit to any local fast-food joint!
True, I converted metric to imperial with minimal rounding, as I didn’t want to give either an unfair advantage. You could round up again to 5-6.2 or down for 4.8-6.2 but my point stands. I think most people would prefer if the units they used most often were in the range of 0.2-10-ish. I don’t think that’s unreasonable.
You can memorise that a person is 10 billion nanoangstroms tall if you like, but surely you can’t be saying that it’s more convenient than using a scale that’s the same order of magnitude as the thing itself. That’s why we use the metric system after all, to give many units as close to the scale of what we’re trying to measure as possible in a standardised way.