# Can you solve the Leonardo da Vinci riddle?

- Institution: TED
- Department: TED-Ed
- Speaker: Tanya Khovanova
- Year: 2018
- Level: For everyone
- Language: English
- Subjects: Mathematics
- Source: [TED](https://www.ted.com/talks/tanya_khovanova_can_you_solve_the_leonardo_da_vinci_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)

You've found Leonardo da Vinci's secret vault, secured by a series of combination locks. Fortunately, your treasure map has three codes: 1210, 3211000, and... hmm. The last one appears to be missing. Can you figure out the last number and open the vault? Tanya Khovanova shows how. \[TED-Ed Animation by Artrake Studio\].

## Lectures

1. [Can you solve the Leonardo da Vinci riddle?](https://invisiblenetwork.ai/learn/ted/tanya_khovanova_can_you_solve_the_leonardo_da_vinci_riddle/c380a18d01a0), 5 min (TED's player)