Parents with students in the Bucks County high school did a double-take when they saw a math homework question that centered on which family member sexually assaulted a young girl.

The possible answers to the question posed at Pennridge High School in Perkasie, Pa., were the girl's mother's boyfriend, brother or father, according to Philly.com and other published reports.

In response, some parents took to a school watchdog Twitter account, @PennridgeReform, to publish screen captures of the question and vent their outrage, writing that "only @ Pennridge is sexual assault in a math problem."

Pennridge Superintendent Jacqueline A. Rattigan has since apologized, saying in a statement quoted by Philly.com that the question was "downloaded from a website that allows teachers around the world to share educational resources. It is not part of our approve curriculum."

Rattigan added that "steps to avoid such occurrences in the future" were being taken.

Here is the actual question:

"y = x+2, 3x+6y = 12, Angelou was sexually abused by her mother's ___ at age 8, which shaped her career choices and motivation for writing."

The multiple choice answers: her mother's boyfriend, brother or father.

Extra credit if you can solve this most unusual math problem in the comments.