# Can you solve the private eye riddle?

- Institution: TED
- Department: TED-Ed
- Speaker: Henri Picciotto
- Year: 2022
- Level: For everyone
- Language: English
- Subjects: Mathematics, Teaching and learning
- Source: [TED](https://www.ted.com/talks/henri_picciotto_can_you_solve_the_private_eye_riddle)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

As Numberland's best detective, you thought you'd seen it all. But the desiccated corpses of prominent natural numbers have been showing up all over the city. A lockdown is ordered from sundown to sunrise, and it's still not enough to stop what can only be described as a vampiric feeding frenzy. Can you figure out why the citizens of Numberland are being attacked? Henri Picciotto shows how. \[Directed by Igor Coric, Artrake Studio, narrated by Addison Anderson, music by Cem Misirlioglu, Greg Chudzik\].

## Lectures

1. [Can you solve the private eye riddle?](https://invisiblenetwork.ai/learn/ted/henri_picciotto_can_you_solve_the_private_eye_riddle/dca79bd5029d), 6 min (TED's player)