These 0 to 10 digits are associated with the specific numbers as shown below.
What are the associated numbers for digits 9 and 10? Why?
Bonus: Is there an associated number for 11?
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First notice that the numbers on the right are
Divisible by the numbers on the left
dividing by the number on the left (for 1 onwards) gives 4,3,11,9,6,9,8,5 which are the numbers of letters in the English spelling of the numbers on the right.
So we are looking for
Numbers such that when you divide the number by the number of letters in its English spelling it gives 9 (and 10). Given that we seem to be looking for the smallest such numbers I think the corresponding answers will be
9 -> 81
10 -> 50
I have yet to find one that works for 11 so not sure that it exists.
Played around a bit more. Here's an updated list that has numbers for 11 and a few more.
If you use the rule of using "and" for numbers greater than 100, you get the number for 11 (I've included a few more too) (88 of the numbers 1-100 have values with this, see https://go.dev/play/p/1gTZV38SapT)