Professorial level requires a perfect score.
15 out of 15. No mistakes. No mercy.
Only attempt this if you're absolutely certain you know your stuff. Very few will pass.
Each level also has a minimum pass score — rising from 11 correct at Novice to a perfect 15 at Professorial. This is not a casual quiz.
15 out of 15 — every single one. Spin for your prize.
Don't slam the phone down and walk away. Spin the wheel — maybe the universe owes you one.