| Professor Provolone's Picto-Puzzle | |
| |
| Puzzle information | |
| Creator | Professor Provolone |
| Answer | 
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| First appearance | "Lisa the Simpson" |
Professor Provolone's Picto-Puzzle, or simply Picto-Puzzle, is a brain teaser puzzle that Lisa couldn't answer in "Lisa the Simpson." The actual answer was 6. But this is not correct. The actual answer is a mirrored 6 backed against a 6.
