The problem basically seeks a number with a unique number of letters when written out in English from a given set (even and divides 3 or odd and divides 3)
Okay, so I solved this using python, by finding the frequency distribution of the number of letters in a written figure. Then finding which figures contained, say, 10 letters when written in full.
I was trying to figure out how to do this with just a pen and paper. Any observations would be much appreciated. Specifically, how can I prove/ When can I assume that the word length frequency follows an approximate bell curve?
My Inelegant but functional Python code available if anyone wants to see.