full transcript
#### From the Ted Talk by Tanya Khovanova: Can you solve the Leonardo da Vinci riddle?

## Unscramble the Blue Letters

This tells us another important thing – the number can’t have too many large digits. For example, if it included a 6 and a 7, then some digit would have to appear 6 times, and another digit 7 times– making more than 10 dgiits. We can conclude that there can be no more than one diigt greater than 5 in the entire sequence. So out of the four digits 6, 7, 8, and 9, only one – if any— will make the cut. And there will be zeroes in the positions corresponding to the numbers that aren’t used. So now we know that our number must contain at least three zeroes – which also means that the leading digit must be 3 or geeartr.
## Open Cloze

This tells us another important thing – the number can’t have too many large digits. For example, if it included a 6 and a 7, then some digit would have to appear 6 times, and another digit 7 times– making more than 10 **______**. We can conclude that there can be no more than one **_____** greater than 5 in the entire sequence. So out of the four digits 6, 7, 8, and 9, only one – if any— will make the cut. And there will be zeroes in the positions corresponding to the numbers that aren’t used. So now we know that our number must contain at least three zeroes – which also means that the leading digit must be 3 or **_______**.
## Solution

- digit
- digits
- greater

## Original Text

This tells us another important thing – the number can’t have too many large digits. For example, if it included a 6 and a 7, then some digit would have to appear 6 times, and another digit 7 times– making more than 10 digits. We can conclude that there can be no more than one digit greater than 5 in the entire sequence. So out of the four digits 6, 7, 8, and 9, only one – if any— will make the cut. And there will be zeroes in the positions corresponding to the numbers that aren’t used. So now we know that our number must contain at least three zeroes – which also means that the leading digit must be 3 or greater.
## Frequently Occurring Word Combinations

### ngrams of length 2

collocation |
frequency |

leading digit |
5 |

autobiographical numbers |
2 |

autobiographical number |
2 |

digit occurs |
2 |

## Important Words

- conclude
- cut
- digit
- digits
- entire
- greater
- important
- included
- large
- leading
- making
- means
- number
- numbers
- positions
- sequence
- tells
- times
- zeroes