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

#### Unscramble the Blue Letters

Why go through all that? Well, we now know something important: the total qiautnty of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 gretaer than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require atnaddoiil digits like 3 or 4 to count them.

#### Open Cloze

Why go through all that? Well, we now know something important: the total ________ of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 _______ than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require __________ digits like 3 or 4 to count them.

2. quantity
3. greater

#### Original Text

Why go through all that? Well, we now know something important: the total quantity of non-zero digits that occur after the first digit is equal to the sum of these digits, minus one. And how can you get a distribution where the sum is exactly 1 greater than the number of non-zero positive integers being added together? The only way is for one of the addends to be a 2, and the rest 1s. How many 1s? Turns out there can only be two – any more would require additional digits like 3 or 4 to count them.

#### ngrams of length 2

collocation frequency

#### Important Words

4. count
5. digit
6. digits
7. distribution
8. equal
9. greater
10. integers
11. number
12. occur
13. positive
14. quantity
15. require
16. rest
17. sum
18. total
19. turns