"The dodecahedron."

“Now this will be a very special exam,” Professor Wong explains, the next day. “For girls only. The government is worried about the math skills of female students. Failure may result in consequences, so do your best, girls. Oh, and to ensure academic integrity, there will be a special anti-cheating rule in place.”

One by one, the girls shuffle into the exam room. Kitty, Rachel and all the other girls in Wong’s incredibly hard math class peel off all their clothing, stripping down to their shoes and socks, and place it in a special bin under Wong’s watchful eye. The naked girls then sit down at their desks, looking nervously at the exam papers before them.

“You may begin.”

It’s a little bit chilly in the exam room, and clinically lit by cold fluorescent tubes. Exam proctors wander between the desks, keeping an eye out for any funny business. Two or three hundred beautiful naked girls squirm on the cold metal of their seats, crossing and uncrossing their legs, goosebumps prickling their thighs, their nipples getting hard.

With a rustle, they turn over their exam papers.

Kitty looks at the first question. It’s about triangles. Underneath it is printed a smiley face, and the words “This is an easy one!”

She turns to the next page. The next question is about squares. It’s even worse.

It’s a very long two hours for the naked girls, struggling with some of the toughest math questions they’ve ever seen in their lives. Finally, with a horrible sinking feeling in her chest, knowing that she’s failed, though not exactly sure what the consequences will be, Kitty packs up her pencil case and walks towards the door with the rest of the girls. Rachel sidles up to her and says “What did you get for 13A?”

“I said it was the dodecahedron.”

“Fuck.”

“Now,” says Professor Wong, as the lid comes off the special clothing bin, “I’ll just give you girls your clothes back, and you’ll be free to… ah. How enigmatic. All your clothes seem to have disappeared.”

There’s a lot of grumbling at this news. “Well,” says Kitty, loudly, “if you think we’re walking back to our rooms naked, you can forget about it!”

“Not to worry, students. It seems we have all these fraternity-branded bikinis instead.”