Ok, here's one from my grade 10 gym (which included sex ed), since you guys are making me think about all kinds of auful things...

"If a couple has sex, but the man withdraws before any emission occurs, can pregnancy occur?"

"correct" answere was "yes"

That word, I do not think it means what you think it means...

Re: estimation. I would answer that she rounded wrong, but would have caught her error if she had observed the small margin of errorr and followed up with a more exact calculation, as is appropriate when rounding.

DS1: Hon, you already finished your homework
DS2: Quit it with the protesting already!