Mark writes:
> The correct answer is apparently 3.

And I think she should be proud and happy to have gotten the "wrong" answer
on this question :-)

Even if there is some logic to the "right" answer, this looks to me like an
utterly useless piece of knowledge.  I have never heard any such terminology
used by a Mathematician, and I recommend that she try very hard to
immediately forget this useless concept.

G.

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