Our math teacher is ill, so we have an assistant covering. He hands out a worksheet pre-prepared by the teacher:
Assistant: “Wait, this can’t be right.”
Me: “What’s wrong?”
Assistant: “This worksheet. It’s all video games.”
Me: “That sounds about right for [Teacher].”
He hands out the worksheet, containing the following words from the teacher:
Teacher’s Note: “You’ll be calculating the optimal way to defeat this monster, using the real spell data provided. Show all work.”
I glance down.
Monster: Hellspawn Brute
Max HP: 10,000
Armor: 150
Resistance: Flat Damage −20%
Resistance: Shadow Damage −40%
Special: Regenerates 2% HP if not killed within 5 turns
My Spells:
Soul Rend: Deals 50% of CURRENT HP, Shadow damage
Arc Burst: Deals 1,200 Flat Damage, Physical, reduced by armor and resistances
I start writing.
Me: *Thinking.* “Okay. Soul Rend takes 50% of whatever’s left… but doesn’t kill. Armor and resistances will reduce Arc Burst from 1,200 to about 840. So: Soul Rend once, then Arc Burst three times.”
After class, the assistant calls me over.
Assistant: “Your answer is incorrect. The fastest solution is to cast Soul Rend twice. Fifty percent and fifty percent. Two moves.”
Me: “Uh… no. It doesn’t kill.”
Assistant: “It halves the health both times. So 100%.”
Me: “…That’s not how percentages work.”
He stares at me.
Me: “If the Brute has 10,000 HP, Soul Rend takes it to 5,000. Then the second cast takes 50% of that. So, 2,500 left. Then 1,250. Then 625. It never hits zero.”
Assistant: “But the worksheet says 50% both times.”
I turn the sheet around and point.
Me: “It says current HP. It scales down. Also, Soul Rend does Shadow damage, which this monster resists by 40%, so it’s actually even less effective. And Arc Burst is Physical, so the armor reduces it. So mathematically, you must mix the spells. Did [Teacher] leave you an answer sheet, or…”
Assistant: “…whatever happened to simple math? This is why I like teaching P.E.! Just gather up your worksheets. I’ll give them to [Teacher] tomorrow!”
The next morning, we all got an email from the assistant on the school’s internal messaging system.
Assistant: “Thanks to several higher-level gamers in [class], and talking to [Math Teacher], I now understand that a 50% spell does not kill a monster outright. I also did not expect the answer to ‘When will I ever use this?’ in a math class to be ‘When playing video games!'”
It was awfully nice of the assistant to admit he was wrong, and even nicer to talk to [Math Teacher] to get an explanation from the source.
I love video games, but I do worry that in the final exam we’ll have to take down an endgame boss…