And she's not just any teacher, she's the head of New York City's AFT affiliate.
I agree with Mike Antonucci that "gotcha!" questions are generally meaningless--I don't remember the name of the new President of Mexico, for instance, or even the Prime Minister of Israel. I don't recall which amendment is the 7th Amendment. There are any number of questions that someone could throw at me for which I wouldn't know the answer.
But this isn't a memorization question, it's a skill question. It's like asking the 17th letter of the alphabet--I don't know what it is offhand, but I can certainly figure it out quickly (it's q). It's pathetic that anyone with a college education, much less a teacher, can't perform an elementary mathematical operation. Notice I didn't say any adult should--I narrowed it down to a college graduate.
Sad. Ties in with this post, don't you think?
Joanne (see blogroll at left) has more details in her post on the topic. According to Joanne, Ms. Weingarden said she'd need paper and pencil to solve the problem 1/3 + 1/4.